A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
There are more chickens than people in the world.
325
Ants don't sleep
15
A lion's roar can be heard from more than five miles away.
40
Slugs have 4 noses!
17
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27
Only male fireflies can fly.
46
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9