A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Only 3% of bird species have penises.
0
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
26
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17