Sheep, goats, octopuses, and toads have rectangular pupils.
7
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
The female pigeon cannot lay eggs if she is alone. In order for her ovaries to function, she must be able to see another pigeon.
65
Female canaries cannot sing.
14
How does a shark find fish? It can hear their hearts beating.
31
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2
The heart of a mouse beats 650 times per minute!
53