Tuataras have a third eye on top of their heads, although it's covered by scales and doesn't function like a normal eye. elaborate share
Ostriches' eyes are bigger than their brains. elaborate share
Owls can rotate their heads almost 360 degrees. elaborate share
Puffins can hold up to 60 fish in their beak pouches at once! elaborate share
Echidnas have four-headed penises. elaborate share
Poison dart frogs don't actually get their poison from their diet, but from insects they eat in their wild habitat. Captive-bred poison dart frogs are harmless. elaborate share
Horseshoe crabs have blue blood, because instead of iron, their blood uses copper to carry oxygen. elaborate share
