The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Cats and dogs can hear ultrasound.
350
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
Lobsters have blue blood.
476
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
The world’s largest frog, the Goliath frog, can grow over 13 inches in length and can jump up to 10 feet in a single bound.
8