When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
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
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6