When dragonflies mate, their tails form a love heart.
22
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Parrot parents "name" their children with a signature call.
112
Nicole Kidman is scared of butterflies.
65
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The oldest recorded elephant lived for 82 years.
213
When cats are happy, they may squeeze their eyes shut.
10