Cats recognise the voice of their owner, but never evolved to care.
22
There are approximately three chickens for every human on Earth.
13
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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132