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
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20