They contend that even the classic examples of batesian mimicry are really examples of Mullerian mimicry. Another mechanism to avoid predation that has evolved repeatedly is cryptic coloration. Crypsis may not only be a good way to avoid predation. See if you can identify the praying mantis in the above picture. Though ants generally don't feed on plants, there are exceptions.
Acacias are thorny trees that grow in the new world tropics.
Other insects that land on the plant, or vertebrates that might try to graze on the leaves, are attacked by the ants. So the plant gains protection, in return for providing the ants with places to live and with food. Ants are generally predacious. These ants form huge colonies. This is an example of mutual exploitation or mutualism.