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
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
There are approximately three chickens for every human on Earth.
13
Rattlesnake mating sessions have been known to last more than 22 hours.
232
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
A 42-foot sperm whale has about 7 tons of oil in it.
209
The seahorse is the only fish to have a neck.
12