A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
Cats recognise the voice of their owner, but never evolved to care.
22
There's a rare breed of pig that looks like a sheep.
14
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5