If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
22
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Only 3% of bird species have penises.
0
Parrot parents "name" their children with a signature call.
112
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Denmark has twice as many pigs as there are people.
66