The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
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
The Basenji dog is the only dog that is not able to bark.
4
The largest earthworm on record was found in South Africa and measured 22 feet.
151
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9