They are the best known example of an electric sensory system. They were accidentally introduced into America and now proliferate out of control. A frog may be startled at first by tree branches swaying in the wind, but it soon stops responding to these kinds of unimportant changes in its environment. Flounder look like the sea floor. A lichen is fungus and algae functioning in cooperation.
Wolves cooperate to hunt the moose.
A robin eats a distasteful bug, spits it out, and never eats one again. She does a round dance. She sits directly above the hive and points toward the food. She leads the way to the food. Whales and dolphins are known to send out clicking sounds and listen to the echoes.