Rattlesnake mating sessions have been known to last more than 22 hours.
232
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
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
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8