A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
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
Elephants are terrified of Bees and actually have a special, distinct vocalization for “Run away the Bees are angry”
49
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Bats sleep 18-20 hours per day.
5
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
A scorpion can hold its breath for up to 6 days.
19