They have bald heads and usually don't have feathers on their necks, either. Bare skin in those areas helps them stay cleaner why they stick their head into a carcass to feed. With no feathers to trap gunk on a vulture's head, meat and blood just dry and flake off. Vultures are able to eat rotting food because they have a strong immune system. And they play a super-important role in our environment as a clean-up crew!