By feeding hens certain dyes they can be made to lay eggs with multi-colored yolks.
40
Dolphins have names for one another.
18
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Rats can't vomit, that's why rat poison works.
68
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17