Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The largest breed of rabbit is the Flemish Giant.
65
Rattlesnake mating sessions have been known to last more than 22 hours.
232
The reindeer is the only mammal that can see UV light.
17
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Cats and dogs can hear ultrasound.
350