The ones animals will self-amputate arms, legs, and even sex organs to survive
https://www.youtube.com/watch?v=v241TF-cSzU To escape a vicious attack from a predatory bird, this crab snips off its injured claw to make a quick getaway. Only a few humans have ever opted for self-amputation in order to escape from danger, but some animals do it all the time. You probably already know that lizards can shed their tails.