Examples of mimicry are widely celebrated because of the remarkable physical similarities they entail. A new study shows how an ant-mimicking spider uses behaviour to create the illusion of antennae, while walking in a manner resembling ants following pheromone trails. Examples of mimicry are widely celebrated because of the remarkable physical similarities they entail. A new study shows how an ant-mimicking spider uses behaviour to create the illusion of antennae, while walking in a manner resembling ants following pheromone trails.