Ants have a surprisingly good public image. School textbooks extoll their industry, teamwork and ability to carry loads many times their own weight. They have inspired management lessons, children’s stories and endless moral tales. Aesop gave us the Ant and the Grasshopper, and the ant has been a role model ever since.
Spiders, on the other hand, have a public relations problem. The popular nursery rhyme has Ms. Muffet running away from her tuffet on sighting one. Their eight legs, multiple eyes and sudden appearances tend to inspire shrieks rather than admiration. Even people who know that most spiders are harmless to humans may prefer not to share a room with one.
Our reactions are not universal, of course, but ants’ visible cooperation makes their achievements easy to appreciate, while spiders’ unfamiliar appearance and hunting habits can make them seem threatening. Humans also have a long cultural history of associating spiders with danger and mystery.
Which makes the ant-mimicking spider a particularly intriguing character. Imagine being a spider in a world where humans admire ants but recoil from you. Why not borrow the ant’s wardrobe?
Nature, of course, is not concerned with human opinion. And that is not the reason why some spiders mimic ants. But evolution has produced some extraordinary impersonators, and these tiny spiders are among its most accomplished.
The art of being somebody else
That ant marching purposefully across a leaf may not be an ant at all. It could be a spider dressed up as one.

This is called myrmecomorphy, from the Greek myrmex, meaning ant. Some spiders have evolved narrow, elongated bodies that resemble an ant’s segmented form. But there is one inconvenient problem: spiders have eight legs, whereas insects, including ants, have six.
The solution is wonderfully ingenious. Some ant-mimicking spiders hold up their front pair of legs and wave them like antennae. They move in jerky, stop-start bursts, rather than with the more familiar gait of a spider. Their body shape and movements together create a convincing illusion. A casual observer who has not stopped to count the legs can be thoroughly taken in.
This disguise can offer protection. Many predators avoid ants because they can bite, sting or deploy chemical defences. By resembling an ant, a spider may persuade a potential predator to look elsewhere. This is a form of mimicry. One particularly well-known example is Myrmaplata plataleoides, which resembles the Asian weaver ant (Oecophylla smaragdina), found in India. Weaver ants are formidable for their size: they have powerful jaws, bite readily when threatened, and can spray formic acid, an irritating chemical, at an attacker. They are also aggressive defenders of their colonies. A predator that has learnt to avoid these ants may hesitate before attacking something that looks like one. The spider’s disguise can therefore offer protection—but it is not foolproof, and the degree of protection depends on which predators encounter it.
The disguise can also help some spiders hunt. Ant-mimicking jumping spiders are active predators with excellent vision, and their appearance and behaviour may help them approach prey without immediately revealing their identity. In nature, impersonation can be both a defensive strategy and a hunting advantage.
Fooled in my own garden?
You do not need to travel to an exotic rainforest to look for these remarkable creatures. Ant-mimicking spiders are found in several parts of India. Studies and observations have recorded them in southern India as well as in regions such as Assam and Jharkhand. Interestingly, they do not all impersonate the same ant. The Asian weaver ant (Oecophylla smaragdina) is one model, while other spiders mimic ants belonging to genera such as Camponotus, Tetraponera and Polyrhachis. The particular disguise varies with the spider species and its habitat. This makes ant mimicry a fascinating example of how evolution produces different solutions to the same challenge: surviving in a world full of predators.
Bengaluru’s gardens, parks, hedges and green spaces provide opportunities to observe spiders and ants in close proximity.
So next time you are watering plants or cleaning your windows (that’s where I sighted mine), look carefully at the ants going about their business. Is one unusually elongated? Does it keep waving its front legs? Does its movement seem just a little different? You may have found an eight-legged impostor among six-legged OGs.
Of course, not every ant-shaped creature is an ant-mimicking spider, and a reliable species identification may require a good photograph or expert examination. But that is part of the pleasure of observing nature: the first answer may not always be the right one.
The next time you see an ant, count the legs before deciding.
–Meena











