A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
A slug has four noses.
136
Rats can tell the difference between two human languages.
49
Flamingos pee on their legs to cool themselves off.
49
Humans and dolphins are the only species that have sex for pleasure.
61
Honeybees never sleep.
276
Rattlesnake mating sessions have been known to last more than 22 hours.
232
A mole can dig a tunnel 300 feet long in just one night!
24