Its huge geographical range stretches from North Africa to South Africa and from Spain to China. Unlike most vultures, the Bearded Vulture has a fully feathered head and neck. This difference is undoubtedly due to a difference in diet. The Bearded Vulture eats mainly bones, so it is not soiled by blood from the carcass. It can swallow whole bones 25 cm long and 3.5 cm in diameter. Bones 10 cm in diameter and weighing 4 kg are also a source of food for the lammergeier. To eat them, the bearded vulture picks them up, flies away and drops them more than 100 m high onto a rocky site to break them into several pieces. These rocky sites are called ossuaries.