Hairy frog

• Life hack: they break their own bones to fight off prey, creating claws

The hairy frog, also known as the Trichobatrachus robustus, is a Central African species of frog in the family Arthroleptidae. When they are attacked by various predators, they will quickly contract their muscles, intentionally break the bones in their hind feet and push the bones out of their skin, creating some claws. Unlike true claws, the hairy frog’s claws are made of bone, and the formation of collagen in the frog’s bones allows these creatures to break the toe tips, not the whole legs.

According to animal experts, this is actually a defensive behavior and that the claws later retract gradually, while the damaged tissue is regenerated.