Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
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
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
A lion in the wild usually makes no more than twenty kills a year.
186
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Parrot parents "name" their children with a signature call.
112