Dogs can rapidly mimic each other's expressions, just like humans and some primates.
Some butterflies have developed a toxic chemical that makes them poisonous to some birds. However, birds recognize which butterflies are lethal and avoid eating them. Since not all butterflies are equipped with such predatory defenses, they mimic their lethal counterparts and trick birds into thinking they are poisonous too.
While evolving with specialized defenses has helped animals escape predation, long-term risks need to be considered. The simple act of camouflage or mimicry, which sufficiently confuses prey, doesn't seem to have backfired, but the use of chemical defenses has. In fact, some amphibians that release lethal toxins to kill predators are now at a higher risk of extinction.
Cape Restio shrubs produce large, dark nuts that mimic antelope droppings and trick dung beetles into planting them, ultimately helping the shrubs become more widespread.
After years of misidentifying Helmeted Woodpeckers, scientists from the University of Kansas have found that the bird has evolved with characteristics of larger competing birds in the Atlantic forest.