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
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
Sloths take two weeks to digest their food.
243
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
A scorpion can hold its breath for up to 6 days.
19
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