The reindeer is the only mammal that can see UV light.
17
When dragonflies mate, their tails form a love heart.
22
Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
16
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Whales and dolphins can't taste anything other than salt.
11