Parrot parents "name" their children with a signature call.
112
When cats are happy, they may squeeze their eyes shut.
10
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
10
The elephant brain weighs about 6,000g.
274
Only 3% of bird species have penises.
0
The seahorse is the only fish to have a neck.
12