While groups of hyena sometimes hunt other animals and take them down for food, a lone hyena is more likely to act as a scavenger, eating the meat of other animals that have died from injuries or that other animals have killed. Other examples of scavengers include vultures, crabs and blowflies.
Many vultures are bald, having no feathers on their head. This adaptation allows them to eat dead animals they find without accumulating on their heads the decaying meat and toxic organisms it contains. Lammergeiers are vultures that survive by eating the bones of dead animals. Their beaks allow them to break open the bones to eat the marrow.
Crabs and lobsters are water-dwelling scavengers. They eat carrion and almost anything else they find at the bottom of the ocean, using their claws to gather their food and bring it to their mouths.
Blowflies are insects that scientists classify as scavengers, even though the animals from which they gather their food are not technically dead. They consume the decaying flesh around the wounds of livestock, even if the animals remain in relatively good health.
With the urbanization of farmland and forests, many animal species convert from hunters to scavengers for survival, eating food from household garbage cans.