Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Denmark has twice as many pigs as there are people.
66
There's a rare breed of pig that looks like a sheep.
14
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
Early American humans hunted car-size armadillos and used their shells for houses.
12
The seahorse is the only fish to have a neck.
12