Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
The Basenji dog is the only dog that is not able to bark.
4
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Cats and dogs can hear ultrasound.
350
Early American humans hunted car-size armadillos and used their shells for houses.
12
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40