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
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
One in three dog owners say they have talked to their pets on the phone.
427
Cats recognise the voice of their owner, but never evolved to care.
22
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Only 3% of bird species have penises.
0
Tigers, leopards, and jaguars love "Calvin Klein's Obsession for Men". The scent is used to attract animals to cameras in the wilderness, and was even a turn on for one pair of Jaguars who were subject to it.
17