Category: nature

A Pesky Problem: Pest Management

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This week we have been exploring quaint expressions that describe human situations using animal analogies. Sometimes these become ‘bees in our bonnet’ as new analogies and comparisons buzz around in our imagination! One of these analogies is our description of someone as a “pest”, and our irritated response to such a person “Don’t pester me!”

Why is the word associated with persistent irritating behaviour in human beings? For that we need to go back to nature.  

A pest is defined as any living thing which humans consider troublesome to themselves, their possessions, or the environment. This includes plants, pathogens, invertebrates, vertebrates or any organism that harms an ecosystem. In its broadest sense a pest is a competitor to humanity. Pests can cause issues with crops, human, or animal health, buildings, and wilderness areas.

Looking at insects alone, it is estimated that 900 million insect types can be ‘pests’ not in nature, but in a world where humans have modified nature to suit their own requirements. And the human species has always found ways, though not wise at times, to tackle insects and other living organisms that they did not like, or want around them. From the earliest times, the battle between humans and ‘pests’ has taken many forms.

Cave dwellers probably swatted mosquitoes or used smoke to ward off the bloodsuckers. As far back as 2500 BC, people used sulfur compounds to control mites and insects. In 1200 B.C., the Chinese deployed predatory ants against pests such as beetles and caterpillars.

With growing populations, and crowded and insanitary living conditions bed bugs and rats proliferated. One of the first publicly advertised pest control companies was the 1690 company H. Tiffin and Son Ltd. in London. The company promoted rat and bed bug control using methods and chemical compounds they invented. Their trademark was “Bug Destroyers to Her Majesty and the Royal Family.”

Probably one of the hardest pests to control are rats. Over the ages, methods to control rats have tried everything from chemicals, plant extracts, prayers, chants, terrier dogs, and music. Ratsbane was one of the first chemicals used. Barbers sold it in the Middle Ages. Then it became a popular item sold by street vendors. Vermin exterminators became a legitimate and in-demand profession. Till date, rats continue to pose a cheeky challenge to every counter measure to control them, and proliferate even in the most sophisticated cities of the world (New York has a serious rat infestation issue).  

Pests are a major threat to health worldwide. Many insects are the primary or intermediate hosts or carriers that transmit debilitating human diseases, ranging from malaria, to Lymes Disease, to Zika. Rodents and birds are also secondary hosts for a large number of diseases transmitted by the parasites that they carry into the human environment — ticks, lice, fleas and mites.

Crops are also at risk from pests which include aphids, caterpillars, whiteflies, locusts and mites. These insects cause damage by feeding on foliage, sucking plant sap, or transmitting diseases. These pests can devastate agricultural yields, reducing quality and quantity, and leading to significant food shortages.

Pests are equally threatening in human habitations. Termites, wood-boring beetles, carpenter ants, and rodents Termites, wood-boring beetles, carpenter ants, and rodents are the primary pests that destroy buildings by compromising structural integrity.

The universal frustration to successfully manage and control pests in every sphere of life, spurred a global effort to increase awareness about pest-related challenges and professional pest control solutions.

On 6 June 2017 the Chinese Pest Control Association hosted 300 participants including industry experts, media representatives, researchers and academic professionals to discuss how to promote awareness about the role of pest management in public health protection. In 2018, the Global Summit of Pest Management Services for Public Health and Food Safety was held in Portugal, and it was agreed to accord international recognition to an annual World Pest Day.

Since then World Pest Day is observed annually on June 6th across the world. The initiative aims to improve public, government and media awareness, strengthen the professional image of the pest management industry, encourage scientific pest control and highlight major threats caused by small pests. The day promotes scientific and responsible pest control practices while creating awareness about the threats posed by pests worldwide.

Sadly, in the past decade the threat of pest-borne diseases is growing due to climate change, international travel, globalization of trade and increasing urbanization taking over the natural habitats of disease-bearing pests. A better understanding of these diseases is essential for managing them in the future.

Parallely there is ever-growing need to produce more food, fodder, fibre and wood. The lifestyles of a number of insects seem to clash with people’s economic interests. There is a competition for resources and humans tend to describe all competitors as pests that have to be fought on a war footing. When the ‘wonder drug’ DDT was invented in 1939 we thought that the war against pests had been won. But soon insects developed a resistance to pesticides. Fighting pests with chemicals alone is not the answer as we have also learned that these chemicals can have terrible side effects on all living things including humans. We can neither turn back to a chemical-free earth, nor can we continue to poison ourselves.

While technology and researches in more effective chemical measures to counter pests continue to advance, what is perhaps being lost is a better understanding of the ‘pests’ and some traditional, and less toxic ways of meeting the challenge. One way is to take a closer look at pest species and their interaction with the environment, especially in agriculture. A combination of cultural, biological, physical and chemical techniques to manage and control pests is called Integrated Pest Management (IPM).  

IPM is an eco-system-based long-term strategy that minimizes economic costs while protecting human health and the environment by using chemical pesticides only as a last resort.  Effective IPM aims at a synergistic integration of five main methods.

Making the environment inhospitable to pests through crop rotation, planting pest-resistant crop varieties, and proper sanitation (removing food and water sources).

Using natural predators especially certain birds, parasites, or pathogens to manage pest populations (e.g., introducing ladybugs to eat aphids or utilizing bio-pesticides).

Using traps, barriers, netting, or temperature manipulation to physically block or remove pests.

Applying synthetic or natural pesticides in a highly targeted manner taking care to minimize unnecessary environmental impact.

Using genetically modified, resistant plant hybrids or crops (like Bt corn) that naturally deter specific pests.

IPM provides a sustainable, eco-friendly alternative that keeps pest populations in check while preserving ecosystem harmony.

“Pest” is a word conveniently created by us to describe whatever we perceive as a deterrent to our well-being. In Nature every creature has a role to play, the distortion of the role begins when we disturb or alter the natural balance.

In an age when technology seems to be the panacea for all ills, it would be wise to stop and remember, as well as respect, that the health of the ecosystem is the key determinant for the health of all living things.

–Mamata

The Bee’s Knees and Other Curious Creatures of Language

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Language is a strange and wonderful thing.

Every day, we use expressions that roll effortlessly off the tongue without pausing to think about what they actually mean. We wish people the “best of luck,” promise to “keep an eye on things,” and complain when life becomes “a rat race.” Most of the time, these phrases do their job so well that we never stop to examine them.

But every now and then, an expression invites a second look.

Take the phrase “the bee’s knees.”

If someone describes a new restaurant, a favourite book, or a clever invention as the bee’s knees, they mean it is excellent—something special, perhaps even the best. Yet the moment one stops to think about it, a question arises.

Why a bee?

And why its knees?

Bees are many things. They are hardworking pollinators, builders of intricate hives, and producers of honey. But their knees do not seem especially famous. No one admires a bee and immediately thinks, “What magnificent knees!”

Yet for more than a century, English speakers have happily used the phrase without demanding an explanation.

The story begins in the United States during the roaring 1920s. It was an age that loved novelty. Jazz filled dance halls, fashions changed rapidly, and language became a playground for creativity. People delighted in inventing colourful slang. Something impressive might be called “the cat’s pajamas,” “the eel’s ankle,” “the monkey’s eyebrows,” or “the bee’s knees.”

These expressions were not meant to be logical. In fact, their appeal often came from their absurdity. The more unlikely the combination, the more amusing it sounded.

Most of these phrases disappeared as fashions changed. Yet a few survived. The bee’s knees buzzed on while many of its companions faded into obscurity.

Perhaps it endured because bees themselves occupy a special place in the human imagination.

Across cultures, bees have long been symbols of industry, cooperation, and diligence. Ancient Egyptians kept bees. Greek philosophers admired their organisation. Medieval monasteries prized beeswax for candles. Farmers depended on pollination long before anyone fully understood the science behind it.

Today, we know that bees are among the most important creatures on the planet. Their daily work helps pollinate crops, wildflowers, fruit trees, and countless other plants. A world without bees would be a poorer and less colourful place.

And in an amusing twist, bees do have something noteworthy on their legs. Worker bees collect pollen in specialised structures on their hind legs known as pollen baskets. If you have ever seen a bee carrying bright yellow clumps of pollen, you have witnessed one of nature’s most efficient collection systems at work.

So while the phrase was probably invented as nonsense, modern biology has accidentally given it a touch of credibility.

The bee’s knees are, in their own way, quite remarkable.

The phrase also reminds us of something larger: language is filled with animals.

Consider how often creatures appear in everyday speech.

When we hear information directly from the original source, we get it “straight from the horse’s mouth.” The expression likely comes from horse traders, who could estimate a horse’s age by examining its teeth.

When someone raises a false alarm repeatedly, we say they “cry wolf.” The phrase traces its roots to one of Aesop’s famous fables, in which a shepherd boy repeatedly tricks villagers into believing a wolf is attacking his flock. When a wolf finally appears, no one believes him.

If a person sends us on a pointless errand, we call it “a wild goose chase.” The expression was popularised by Shakespeare, who used it in Romeo and Juliet. Today, it describes any pursuit that is unlikely to succeed.

Then there is the curious warning not to “look a gift horse in the mouth.” Once again, horses are involved. Since age and health could be judged from a horse’s teeth, examining the mouth of a horse that had been freely given was considered ungrateful.

Some animal expressions are easier to understand.

Someone who is “busy as a bee” needs little explanation. A person with “eagle eyes” sees details others miss. A “social butterfly” moves easily from one conversation to another.

Others are delightfully baffling.

Why do we have “ants in our pants” when we are restless? Why are secretive people said to be “as sly as a fox”? Why do difficult situations become a “dog’s breakfast” in some parts of the English-speaking world?

The answer often lies in history. These phrases are linguistic fossils, preserving traces of old occupations, folk tales, observations of nature, and forgotten jokes. Long after the original context disappears, the expression remains.

In this way, language resembles an attic filled with heirlooms. We continue to use objects whose stories have been partly forgotten. Their meanings survive even when their origins grow hazy.

That may be why expressions such as “the bee’s knees” continue to charm us. They remind us that language is not merely a tool for communication. It is also a record of human imagination.

Generations of speakers have played with words, invented absurd images, borrowed ideas from animals, and passed them on. Most vanished. A few endured.

And among those survivors is a tiny insect whose unlikely knees have become a symbol of excellence.

Not bad for a creature that was probably never consulted on the matter.

The next time someone describes a book, a meal, a holiday, or a grandchild as “the bee’s knees,” spare a thought for the strange journey of that phrase. It has travelled through jazz-age slang, survived changing fashions, outlived dozens of rival expressions, and settled comfortably into modern English.

That, one might say, is the bee’s knees of linguistic success.

–Meena

The Report Card Nature Gives Us

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Every year, World Environment Day arrives with familiar images — children planting saplings, speeches about sustainability, green logos replacing corporate blue for a day, and social media flooded with pictures of forests, oceans, and endangered animals.

And then, by the next morning, the world goes back to business as usual.

Factories continue to pollute rivers. Wetlands quietly disappear under concrete. Species vanish before most people even learn their names. Cities expand. Forests shrink. Temperatures rise.

Which raises an uncomfortable question: if every country claims to care about nature, who is actually doing a good job?

Surprisingly, the world has no single official answer.

There is no universally accepted “Nature Conservation Score” for countries. No equivalent of a cricket points table or Olympic medal tally for ecological responsibility. Instead, scientists, universities, conservation groups, and international organisations have created different systems to measure different aspects of environmental performance.

One of the best-known systems is the Environmental Performance Index (EPI), developed by Yale Center for Environmental Law & Policy and Columbia University. The EPI attempts to rank countries using indicators such as air quality, climate policies, biodiversity protection, water management, pollution control, and ecosystem vitality. In essence, it asks a broad question: How seriously is a country managing its environmental responsibilities?

The rankings often produce interesting results. Countries celebrated for economic growth may perform poorly environmentally. Others, less visible on the global stage, emerge as ecological leaders because of stronger conservation policies or lower environmental damage.

But the EPI is only one lens.

More recently, researchers introduced a more focused Nature Conservation Index (NCI) — an attempt to specifically measure how well countries protect biodiversity and ecosystems. Unlike broader environmental rankings, the NCI looks more directly at habitat conservation, threats to species, land-use pressures, governance systems, and future ecological risks.

This distinction matters. A country may have good urban pollution control but still destroy forests. Another may generate renewable energy while severely damaging wetlands. Environmental protection is a complex web of interconnected systems.

Then there is the Living Planet Index, produced by World Wildlife Fund. This index does not mainly rank countries. Instead, it tracks wildlife populations across the planet. And its findings are sobering. Many species populations worldwide have shown dramatic declines over the past decades. The Living Planet Index functions almost like a planetary pulse monitor. It asks: Is life itself becoming richer or poorer?

Another globally influential system comes from the International Union for Conservation of Nature — better known through its famous Red List of threatened species. The Red List categorises plants and animals according to extinction risk: vulnerable, endangered, critically endangered, and so on. When a species enters those categories, it becomes more than a scientific statistic. It becomes a warning signal about collapsing ecosystems.

Meanwhile, the Convention on Biological Diversity, linked to the United Nations, tracks biodiversity targets globally. Countries commit to goals involving protected areas, restoration, invasive species control, and ecosystem protection. These are not rankings in the conventional sense, but they form a vast international attempt to monitor humanity’s relationship with nature.

Why do all these measurements matter?

Because societies pay attention to what they measure.

Governments obsess over GDP growth because GDP is measured constantly. Investors track stock indices daily. Universities chase rankings. Sports teams live by points tables.

Environmental indicators attempt to bring the same discipline to ecological survival.

Without measurement, environmental destruction easily hides behind rhetoric. Governments can announce “green missions” while rivers die quietly. Corporations can advertise sustainability while their activities may lead ecosystems to degrade invisibly. Numbers are imperfect, but they create accountability.

And they also expose an uncomfortable truth: economic success and ecological wisdom are not always the same thing In fact, they are usually contrary..

Modern economies often reward extraction more than preservation. A forest cut down for mining can increase GDP immediately. A wetland converted into real estate may generate investment and jobs. Yet the ecological loss — biodiversity, groundwater recharge, carbon storage, flood protection — rarely appears in economic accounting.

India illustrates the challenge vividly. Few countries possess India’s ecological diversity — Himalayan ecosystems, rainforests, mangroves, coral reefs, deserts, grasslands, and rich wildlife habitats. At the same time, India faces immense developmental pressures: urbanisation, infrastructure expansion, industrialisation, mining, and rising consumption.

This creates difficult questions with no easy answers.

How much forest should be sacrificed for highways?

Can renewable energy projects damage fragile ecosystems?

How should tourism be balanced against biodiversity protection?

Every country now faces versions of these dilemmas.

That is why World Environment Day should perhaps evolve beyond symbolic tree-planting ceremonies and recycled slogans. The real environmental challenge is not whether humanity loves nature in theory. It is whether nations are willing to measure honestly what they are destroying, preserving, or restoring.

Nature conservation measures try to correct this blindness. Because ultimately, these indices are not really judging forests or rivers. They are judging us. They ask whether humanity is behaving like a responsible custodian of the planet — or merely a temporary consumer exhausting an inheritance built over millions of years.

And perhaps the most unsettling reality is this:

Nature does not care about our speeches, campaigns, or hashtags.

It responds only to actions.

–Meena

A Very Sticky Berry: Glueberry

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At a recent visit to a local farmer mela my attention was drawn to some lovely pinkish orange berries neatly packed in a plastic box. The farmer told me that these were a variety of local berries called gunda in Gujarat. While I was familiar with the slightly bigger and green varieties of this fruit which our aunts used to pickle in brine, I had not seen these smaller differently-coloured versions.

I brought home a box and my husband was most amused to see the packaged product. He recalled picking these in the wild in his childhood, and also how it was a bit of a pain to eat these as they were extremely sticky from the inside and did not make for a pleasant gustatory experience (at least not from him). The fun was in the picking, as part of the summer adventures in a small town. But he did remember that the sticky goo was effective in mending kites (which was a real passion).

Now I was curious. I discovered that the berry was in fact commonly known as glueberry! Its statelier botanical name was Cordia dichotoma, a tree of tropical and subtropical regions. Native to China, the tree is also found in parts of Japan, Pakistan Sri Lanka, Cambodia, and stretching across the South East region all the way to Australia and Vanatua. In India it is found in a variety of forests ranging from the dry, deciduous forests of Rajasthan to the moist deciduous forests of Western Ghats. The tree’s fast growth and tolerance for harsh, arid environments make it excellent for windbreaks, agroforestry, and animal fodder

This is a small to moderate-sized deciduous tree with a short crooked trunk, with a greyish brown bark and spreading crown. The white short-stalked flowers open only at night. The fruit is yellow or pinkish-yellow, shining and spherical, which turns black on ripening.

The bark and the leaves, as well as the fruit have medicinal values. They have been traditionally used in the treatment of stomach aches, coughs, and chest complaints, as well as diarrhea. The nutrient-dense berries are used in Ayurveda and Unani systems to soothe respiratory issues, promote digestion, and treat skin ailments.

The fruit—glueberry, also known as lasoda, gunda or bhokar is used when it is green, as well as when it ripens. The fruit can be eaten fresh, pickled or used as a vegetable. In South Asian cooking the green fruits are prized for making tangy pickles and chutneys. The ripe translucent berries are sweet and edible with a taste described by some as a combination of pineapple and mango.

The fruit pulp contains a sticky, natural mucilage which was traditionally used as a natural adhesive or a binding agent much before the advent of synthetic glues. Its historical significance as a natural, plant-based adhesive is well-documented.

The fruit was commonly rubbed on envelopes to seal them. Its sap was used to bind various materials together. The sticky pulp was also used to trap birds, hence it was also called Bird Lime Tree. And the sticky mucilaginous pulp of the fruit served as a reliable natural glue and was used to bind books, scriptures and manuscripts. And in the less documented uses, children used it to securely repair torn kites.

No wonder then, that the Glueberry truly lives up to its name!

Today this free-growing fruit is travelling from its native habitats, neatly packed and marketed in urban markets. An indigenous fruit sold for its exotic taste!

–Mamata

Nature’s Rule-Breakers: Flora and Fauna That Refuse to Behave “Normally”

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When we are children, nature is explained to us in neat categories. Birds fly. Fish swim. Spiders spin webs. Plants make food from sunlight and quietly stay rooted in place. Mammals give birth to live young.

And then, slowly, nature begins to reveal its mischievous side.

A spider hunts like a tiger instead of spinning a web. A fish walks on land. A plant eats insects. A mammal lays eggs. A mushroom traps worms. The more one studies biology, the more one realises that evolution has very little respect for the tidy boxes humans create.

Take the Huntsman spider, for instance. Most of us imagine spiders as patient architects sitting in intricate webs, waiting for prey to blunder in. The huntsman spider does something entirely different. It stalks and ambushes prey, relying on speed and agility rather than silken traps. In many ways, it behaves more like a tiny leopard than a conventional spider.

It is not alone.

The Jumping spider has remarkably sharp vision and leaps onto prey with astonishing precision. The Wolf spider actively chases its victims across the ground. The Trapdoor spider lives in underground burrows and springs out like an ambush attacker in a war film.

These creatures remind us that even within a single group, evolution can produce wildly different lifestyles.

Then there are mammals — supposedly the most familiar class of animals to humans. Mammals, we are taught, give birth to live young. Except some do not.

The Platypus looks as though it was assembled from spare parts: duck bill, otter feet, beaver tail — and it lays eggs, and it is a mammal! The male even has venomous spurs. Its cousin, the Short-beaked echidna, also lays eggs despite being a mammal covered in fur.These monotremes are evolutionary oddities, survivors from a far older branch of mammalian history. If they were discovered as fossils rather than living creatures, many scientists might have assumed them to be fictional hybrids.

Birds, too, refuse to follow the script.

We instinctively associate birds with flight, yet the Ostrich abandoned the skies to become the world’s fastest running bird. The Penguin transformed wings into underwater flippers and effectively “flies” through the sea instead of air. The Kiwi of New Zealand behaves almost like a nocturnal mammal, shuffling through forests at night with a powerful sense of smell.

And some creatures seem unable to decide whether they belong on land or in water. The Mudskipper spends large amounts of time outside water, “walking” across mudflats using its fins. The Walking catfish can wriggle across land between ponds. The Climbing perch survives out of water for surprisingly long periods.

Plants provide perhaps the most startling examples of all because we rarely think of them as active or predatory. The Venus flytrap snaps shut on insects with startling speed. Pitcher plant species lure prey into liquid-filled traps where victims drown and decompose. The Sundew uses sticky tentacles to ensnare insects. The underwater Bladderwort employs tiny vacuum traps. These carnivorous plants evolved in nutrient-poor soils where ordinary plant life struggled. Instead of relying solely on the earth for nourishment, they turned to meat.

Some plants go further still and become outright thieves. The parasitic Dodder wraps itself around other plants and steals nutrients directly from them. The Indian pipe is ghostly white because it lacks chlorophyll almost entirely.

Even fungi refuse to stay within expectations. Certain fungi trap microscopic worms using tiny snares and digest them alive. The common Oyster mushroom can behave like a microscopic predator. Ophiocordyceps unilateralis goes a step further, infecting ants and manipulating their behaviour before killing them in locations ideal for fungal growth.

Nature’s rebels are not limited to these. The Electric eel generates electricity powerful enough to stun prey. The Leaf sheep, a tiny sea slug, steals chloroplasts from algae and briefly becomes “solar-powered.” The New Caledonian crow manufactures tools, while the Naked mole-rat lives in colonies resembling ant societies, complete with a queen.

The deeper one looks into nature, the clearer it becomes that “normal” is mostly a human invention. Evolution does not work toward ideals or categories. It experiments endlessly. If a strange adaptation improves survival — whether that means a spider abandoning webs, a fish walking on land, or a plant eating insects — nature keeps it.

In fact, these biological rebels may teach us the most important lesson of all: survival often belongs not to the strongest or fastest, but to the adaptable, the unconventional, and the creatures willing to break the rules.

–Meena

Pic: Hunstman spider, Meena Raghunathan

Shades of a Purple Summer

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The Indian summer is when our trees put up the most spectacular flower shows. Flame of the Forest—Butea monosperma whose flowers arrive in blazing orange. Different in tone, is the gulmohar—Delonix regia, with its wide, umbrella-like canopy and bright red blooms. The golden counterpart to these reds is the amaltas—Cassia fistula. Long cascades of yellow flowers hang down in late spring and early summer. The ubiquitous neem–Azadirachta indica has small white flowers which are easy to miss, but their scent. And they are an important part of New Year celebrations in many states.

Among all these are the purples. Three of them are commonly seen–the Pride of India, the loosely termed Indian Princess Tree, and the jacaranda form a quiet sequence of lilac and violet. Less flamboyant, but with gravitas.

The Pride of India or Lagerstroemia speciosa, is both widespread and rooted. Native to the subcontinent, it thrives across peninsular and eastern India, and is deliberately planted in northern cities. It is a familiar presence along older avenues, institutional campuses, and residential roads—part of an earlier approach to urban planting that valued seasonal change as much as shade.

It flowers in dense clusters of lilac, mauve, and pink when most trees recede. The effect is immediate. A single tree can alter the look of a street. The name reflects thatm rather than any scientific classification—an attempt to capture abundance and presence.

After flowering, it produces dry capsules that split open to release light, winged seeds, dispersed by wind. The process is largely unnoticed but effective, allowing the tree to regenerate in suitable conditions. Its flowers attract insects; in turn, birds move through its branches while foraging. Species such as the Red-vented Bulbul and Common Myna are frequent visitors, while others use it as a perching and nesting site, especially in dense urban areas where such cover is limited. In peak summer, its canopy becomes a resting space—shade functioning as habitat.

There is another layer to its presence. The leaves of Lagerstroemia speciosa—often called banaba—are used in traditional medicine, particularly in managing Type 2 Diabetes. They are associated with blood sugar regulation, as well as anti-inflammatory and antioxidant properties. This makes the tree unusual among urban ornamentals: it is not only seen and inhabited, but also used.

The Indian Princess Tree, often linked to Paulownia tomentosa, sits less comfortably in place. Despite the name, it is not native to India and is only sporadically seen—mainly in cooler hill regions or curated landscapes. The “Indian” prefix reflects randomness in naming rather than origin.

Its appeal lies in its restraint. Pale violet flowers, broader leaves, and a more open form create a softer effect than the Pride of India. The “princess” is probably drawn from this visual delicacy.

Its biology, however, is less restrained. After flowering, it produces capsules filled with thousands of fine, papery seeds, designed for long-distance wind dispersal. Given open ground and the right climate, these seeds germinate quickly. The tree grows fast, which explains both its horticultural appeal and its reputation, in some regions, as invasive. In India, its presence fortunately remains controlled and limited.

Ecologically, it plays a lighter role, probably because it is non-native. Its flowers attract insects, and birds may use it for cover or occasional nesting, but it is not a significant food source.

Between these two sits the Jacaranda—Jacaranda mimosifolia—not native, but now visually embedded in cities such as Bengaluru. Its lavender-blue flowers arrive earlier, often bridging spring and summer. For a brief period, roads are edged and sometimes carpeted with fallen blooms, before other trees come into flower.

Jacaranda’s role is largely aesthetic, but not only. Its spreading canopy provides filtered shade, and like the others, its flowering attracts insects, drawing in birds that follow.

Together, these trees complicate their own names. One is called “of India” and is largely at home. One is called “Indian” and is not. One carries no such label and yet feels entirely part of the Indian landscape. Naming suggests belonging; ecology tells a more precise story.

These three trees also differ in how they are encountered. The Pride of India tends to define a street, its flowering visible from a distance. The Princess Tree, where it appears, is noticed more gradually—through proximity, through shade. Jacaranda sits between the two, its colour spreading outward, often first seen on the ground before it is traced back to the tree.

What they share is timing. Each blooms when the landscape offers little else. Their flowering is staggered, creating a sequence rather than a single event. Jacaranda fades as the Pride of India strengthens; elsewhere, other species take over. The effect is not continuous bloom, but continuity of change.

In older Indian neighbourhoods especially in Bangalore, such trees point to a different planning logic. Streets were planted not just for shade but for variation—for shifts in colour, density, and light across months. As urban density increases and tree cover becomes more functional than expressive, these older plantings remain as records of that intent.

A shift in colour. A canopy that briefly interrupts heat. And, overhead, a dry capsule opening—unseen, but already carrying the next season forward. That is the Indian summer.

–Meena

Rainbow Island: Hormuz

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Just over a month ago, the name Hormuz did not mean much for a large population of the world. Today the word is making headlines across the globe. The blockade of the Strait of Hormuz is having a ripple effect far from the waters of the Persian Gulf. Sadly, its claim to fame is rooted in the fall-out of a war that the world did not, and does not need.

For centuries ships have been sailing through the waters of the Persian Gulf, carrying people and cargo, and perhaps, not as visibly, culture. These waters are not just transporters, they are also the space for small land formations, many of which are unique in their geology and biogeography. One such island is the island of Hormuz.

Hormuz Island is a part of the Hormozgan Province of Iran. Located about eight  kilometres from Bandar Abbas on the coast of Iran, and 18 km from Qeshm Island in the Persian Gulf, it is strategically perched where the Persian Gulf and the Gulf of Oman meet. Hormuz island covers an area of approximately 42 square kilometres.

The ancient Greeks called it Organa; during the Islamic period it was known as Jarun, and later took the name Hormuz from a significant mainland port of Ormus. It is believed that around 1300 A.D. the ruler of this town and its inhabitants shifted to the island in order to evade attacks by Mongolian and Turkish troops. Thus they called their island home New Hormuz. Today it continues to be recognized simply as Hormuz.

Its strategic location at the entrance of the Persian Gulf has historically made Hormuz Island a key trading post. It was an important stop for traders on the Silk Road. In the 15th century a Russian merchant described it as “a vast emporium of all the world”.  

It was part of a flourishing kingdom during the medieval period. This attracted the attention of the European powers. In the early 16th century it was taken over by the Portuguese who established a fort there, which helped the Portuguese to control strategic trade routes between Europe, India, and the Far East, and dominate the spice trade.

It remained a Portuguese colony for almost a century and a half, before being taken over in 1622, by the Safavid Empire, run by a powerful Iranian dynasty. It has been a part of the Persian empire since then, and is today a part of Iran.

Even today the island’s culture and customs reflects a blend of the Arab influences from neighbouring countries, as well as past interactions with Portuguese, English, and Indian merchants. The island today is home to Persians Arabs, and the indigenous Hormuzis, each contributing to the rich cultural mosaic.

What makes Hormuz Island unique are its dazzling geological features. It is one of the biggest salt domes—where a mound of salt layers rises up through overlying layers of rock. The formation glows with brilliant shades of red, yellow and orange. This palette is created by the deposition of minerals which constitute the layers of shale, clay, and volcanic rock. Geologists believe that hundreds of million years ago shallow seas formed thick layers of salt around the margins of the Persian Gulf. These layers gradually collided and interlayered with mineral-rich volcanic sediment in the area, leading to the formation of the brilliantly coloured soil and mountains. The high percentage of minerals, including iron, gypsum, oligiste, apatite and quartz has given colour to all the geographical features—ochre-coloured streams; beaches with sand ranging from white, silver and gold, to crimson; the Rainbow Mountains whose vibrant colours range from deep reds and oranges to purples and yellows, and natural salt caves that resemble vibrant works of art. The beaches are covered in crimson sand, and when the waves wash over these, the water also takes on reddish and pink hues. Because the beach’s red glow could be spotted from far out at sea, sailors once used it as a natural navigation marker in the Strait of Hormuz.

The geological formations on the island include the Valley of Statues, a surreal landscape with natural rock formations; Silence Valley which is has an eerie landscape of salt formations and is completely silent; and the Cave of the Salt Goddess formed over thousands of years by water erosion and salt crystals, the walls of which shimmer with vibrant shades of whites, blues, purple and pinks.

In this stunning landscape, the Red Mountain stands tall. This is even more unique because not only is its soil is bright red, it is also edible!  

The red soil is caused by haematite, an iron oxide which comes from the islands volcanic rocks. The mineral is valuable in the production of cosmetics, paper, plastic, stainless steel, ceramics, tiles, pottery and glass, and was exported for this, but the exports have now been reduced to prevent overexploitation. This soil is found nowhere else in the world; however it is not permitted to carry any samples out of the island, even as a souvenir.

The soil plays an equally important part in local cuisine! Known as Gelack, it is an important ingredient, in local cuisine. It is used as a spice, especially in the traditional fish curry called sooragh. A rare edible soil that is a valued spice in itself!  

If Hormuz Island is renowned for its geological features, it is equally rich in biodiversity. A patch of mangroves at its northern end adds a touch of green to the vibrant palette. The island ecosystem harbours a rich variety of bird species, and the waters are home to thriving marine life.

With its kaleidoscope of natural colours, Hormuz aptly deserves the title of Rainbow Island. Sadly the rainbow is today eclipsed by the dark clouds of war.

-Mamata

A Dazzle of Zebras

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Black on white, or white on black? This is the question that is most commonly asked about the zebra. The striking black and white pattern on a zebra is its most distinguishing feature. If it were not for this, a stripe-less zebra may well pass off as a sturdy mule! What the zebra does have in common with a mule and a horse, is that all these are equines. What makes zebras different is their patterned coat, and the fact that they are found in the wild only in Africa. Three main species of zebra are found across different countries of the African subcontinent. Plains zebras have wide stripes set far apart. They are found in grasslands across much of eastern and southern Africa. The Mountain zebra, the smallest species, lives in dry upland plains and is native to Southern Africa, Namibia and Angola. Grevy’s zebra, is the largest and most distinctive, with thin stripes, and lives in dry, sparsely wooded areas in Kenya and southern Ethiopia.

Zebras are not just known for their striking appearance; they also hold a unique place in the animal kingdom with respect to their social structures and behaviors. These herbivores are highly social animals, often forming large herds that provide support, and protection against predators. Within a herd, zebras tend to stay together in smaller family groups. Families are generally made up of a male, several females, and their young. Mutual grooming by standing close to each other and pulling loose hairs off each other is a way of strengthening bonds between members. The friendly grooming may turn aggressive in mating season when the males may use bites and powerful kicks to combat their rivals in order to obtain a mate.

Zebras also graze in groups. They are herbivores and often spend up to 18 hours daily feeding in the wild. As a zebra grazes, it uses its sharper strong front teeth to bite the grass, and then uses its duller back teeth to crush and grind. A zebra’s teeth keep growing for its entire life, because constant grazing and chewing wears them down. They have special digestive systems (hindgut fermenter) which can break down highly fibrous plants, twigs and even bark!

Within the herd, these animals have a range of communication systems, with distinct vocalizations that include whinnies, barks, snorts, and huffs. They also use body language, such as ear positioning, to express emptions. When feeling threatened, zebras flatten their ears against their heads; whereas ears pricked forward indicate that they are alert to something. They have exceptional hearing and eyesight which serves to sense danger early. A two-syllable call warns the herd of approaching predators. This is also the signal for the herd to take off and run for their lives. And they can move incredibly fast, reaching speeds of 65 km per hour. Zebras rely on this speed as well as their agility and stamina to help them outrun predators. One trick they use, is to run in a zigzag direction to confuse other animals. Another asset that helps is their ability to sleep while standing. This is possible because of locking joints–they can subconsciously lock their knees into position while they doze, without fear of toppling over. This means that they save time in getting to their feet and running in case of a threat. For deep sleep they need to lie down.

While zebras need to move fast to save their lives, they also have to be on the constant move in search of fresh grass and water to sustain the large numbers. In the dry season, they join other grazers and browsers like wildebeest, in huge herds of hundreds of thousands, for a humongous migration. One of the most famous of these is the Serengeti migration.  

While zebras may look identical from a distance, each one has a distinct pattern, much like human fingerprints. There are several theories about the role of stripes. One is that these can help individuals recognize each other within the herd. A single zebra stands out in the landscape. But when the striped herds move in unison, it makes for a dazzling optical illusion that makes it difficult for predators like lions and hyenas to single out individuals, thus providing a critical defense mechanism. It is most appropriate then that  the collective noun for a group of zebras, is a dazzle of zebras!  

Colours aside, the pattern also blends with the tall wavy lines of grass and help to conceal the animal in the wilderness. It is also believed that while the white stripes reflect light and keep the zebras cool while they stand and graze in the hot African sun all day, the black stripes absorb heat from the sun and warm up the animals in the morning. Some other researchers think that zebra stripes may have evolved to protect the animals from horsefly bites.

While scientists continue to research ‘why’ the zebra has stripes, African folk tales creatively imagine ‘how’ the zebra got its stripes. A popular Zulu story explains this.

Long, long ago, a big fierce Baboon came to live on the banks of the river where all the animals in the grassland came to drink water. But now Baboon declared himself the sole proprietor of the area, and declared that no other animal could drink from the river. Several animals tried to remind Baboon of the shared rights, but no one could stand up to the big bully who bared his long sharp teeth and flexed his might. Until a brave young zebra decided to challenge him to a fight. In those days, zebras were pure white. Baboon was a veteran of many battles, and was so confident of winning that he agreed, with the condition that the loser would be banished to the barren land across the river. And so the fight began. Zebra used his sharp hooves and strong kicks, Baboon attacked with his fangs. Baboon gained the upper hand and threw zebra backwards into the blazing logs of a fire. The flames seared Zebra’s white coat. In dreadful pain, but in a huge burst of final strength, Zebra gave a mighty kick to Baboon that sent him flying across the river. Baboon fell with such force onto a sunbaked rock, the hair on his behind was singed away. And till today, baboons have a bald red patch on their behind. As for the zebra, the flames charred permanent black marks on his white coat. Since then zebras wear their striped coats with pride, and a tribute to the brave zebra! So instead of pondering the “black on white or white on black” conundrum, let’s just say that zebras are black and white!

While zebras are still found in large numbers, as with all wildlife, they too face threats from loss and degradation of their natural habitat, human-wildlife conflict, and poaching.

31 January is marked as International Zebra Day. A good day to learn more about, and to celebrate this striking animal.  

–Mamata

Madhav Gadgil: The People’s Scientist Who Helped Win India’s First Environmental Struggle

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Madhav Dhananjaya Gadgil (24 May 1942 – 7 January 2026) was a towering figure in Indian ecology — a scientist, policy-maker, mentor, and grassroots environmentalist whose work reshaped how India understands the links between nature, people, and development. Often called a “people’s scientist,” Gadgil blended rigorous ecological science with deep respect for local communities, popular movements, and democratic participation in environmental conservation.

Silent Valley: India’s First Environmental Movement

Gadgil played a key role in one of the defining moments in India’s environmental history–the Save the Silent Valley Movement in Kerala during the late 1970s and early ‘80s. The state government had proposed a hydroelectric dam project that would have submerged a pristine stretch of rainforest in the Western Ghats, home to unique biodiversity. Local communities, scientists, poets, students, and activists mobilized against the project, marking one of India’s earliest and most influential environmental movements.

While many voices led by the Kerala Sastra Sahitya Parishad (KSSP) contributed to the struggle, Madhav Gadgil’s role was pivotal. His ecological research, field surveys, and clear articulation of Silent Valley’s extraordinary biodiversity helped transform localized protest into a nationwide call to protect forests and biodiversity.

He was a member of the high-level committee set up by the Government of India to take a call on this issue. The multidisciplinary committee was chaired by Prof. M. G. K. Menon, former Secretary to the Government of India. Gadgil served as a member of this expert committee, contributing ecological assessments that highlighted the valley’s irreplaceable biodiversity and the risks of irreversible ecological loss. His scientific input helped strengthen the case against the dam and gave credibility to what was, at the time, an unprecedented challenge to state-led development.

Equally significant was Gadgil’s engagement beyond formal committees. He worked closely with activists and civil society groups, translating complex ecological arguments into accessible language. Silent Valley demonstrated that science could empower people, and that environmental decisions could be contested democratically. The eventual shelving of the project and the declaration of Silent Valley as a National Park marked a watershed — proving that ecological reasoning and public mobilisation could alter national policy.

The success at Silent Valley is widely considered India’s first major environmental movement, catalyzing grassroots activism and inspiring future campaigns from the Narmada Bachao Andolan to forest rights movements across the country. Gadgil’s engagement with activists and communities during this period helped to define the approach for the environmental movement in India — one that bridged science, social justice, and grassroots mobilization. 

Early Life and Academic Foundations

Born in Pune to economist Dhananjay Ramchandra Gadgil, Madhav Gadgil grew up with a curiosity for nature that would shape his life’s work. After earning his Ph.D. from Harvard University, he returned to India and joined the Indian Institute of Science (IISc), Bengaluru, where he founded the Centre for Ecological Sciences in 1983 — one of the country’s first research institutions dedicated to ecology, conservation biology, and human ecology. He helped usher in quantitative and rigorous ecological research in India, while challenging scientists to see humans as part of ecosystems, not apart from them. He has over 250 scientific papers and several influential books.

Championing Community-Centric Conservation

Long before “community participation” became a buzzword in environmental policy, Gadgil argued that local people must be placed at the center of conservation efforts. He believed that traditional and indigenous ecological knowledge — from sacred groves to tribal land management — holds the keys to sustainable stewardship of ecosystems.

Western Ghats and the Gadgil Commission

Gadgil’s commitment to community-centric conservation reached a new peak in 2010 when the Government of India appointed him chair of the Western Ghats Ecology Expert Panel (WGEEP) — later known as the Gadgil Commission. The panel’s 2011 report recommended that nearly 64 % of the Western Ghats — one of the planet’s most significant biodiversity hotspots — be designated as ecologically sensitive areas (ESAs), with varying restrictions on development activities. It emphasised not only environmental safeguards but also community empowerment and sustainable livelihoods. 

Although the report was met with political resistance in several states and its recommendations were later diluted, its bold scientific and ethical vision sparked intense public debate and ongoing legal and civic activism. Subsequent environmental crises, including major floods in Kerala and Karnataka, vindicated many of the panel’s warnings about unchecked development and ecosystem fragility. 

Policy Influence and National Legacies

Gadgil helped shape India’s environmental legal framework. He was one of the key architects of the Biological Diversity Act (2002), which created mechanisms like People’s Biodiversity Registers to document and safeguard local biological knowledge. He also contributed to implementation of the Forest Rights Act, strengthening community claims over traditional lands. His advisory roles included membership on the Scientific Advisory Council to the Prime Minister and various national conservation bodies. 

Honours and Recognition

Gadgil’s work garnered some of the highest honours in science and conservation, including the Padma Shri (1981), Padma Bhushan (2006), the Tyler Prize for Environmental Achievement, the Volvo Environment Prize, and the UNEP’s Champion of the Earth award in 2024 — the United Nations’ top environmental accolade. 

In an age where climate, biodiversity loss, and development pressures intensify, Gadgil’s ethos — that science must serve society and empower its most vulnerable — continues to inspire generations of environmentalists, scholars, policymakers, and citizens alike. 

We are blessed to have had such a dedicated eco-warrior, teacher and scientist.

RIP Madhav Gadgil

–Meena