pellet

In ornithology, a pellet is a usually small, rounded, or cylindrical mass of indigestible material, such as bones and fur, that is regurgitated by a bird of prey. Birds of prey, also known as raptors, are carnivorous birds that hunt and feed on other animals. They include species like hawks, eagles, vultures, and owls. These birds possess hook-tipped beaks and sharp talons to capture their prey. The indigestible parts of their meals, like fur, feathers, and bones, are compacted into a pellet and then expelled from the bird's body.123