There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Moths are unable to fly during an earthquake.
328
A group of pugs is called a grumble.
10
Bats sleep 18-20 hours per day.
5
Cats recognise the voice of their owner, but never evolved to care.
22