A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
In Australia, there are spiders big enough to eat snakes.
20
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Camels and llamas can cross breed. The offspring is called a ‘Cama’.
10
A 42-foot sperm whale has about 7 tons of oil in it.
209