Birds of prey or predatory birds, also known as raptors, are hypercarnivorous species of bird that actively hunt and feed on other vertebrates, mainly mammals, reptiles, and smaller birds. In addition to speed and strength, these predators have keen eyesight for detecting prey from a distance or during flight, strong feet with sharp talons for grasping or killing prey, and powerful, curved beaks for tearing flesh. Although predatory birds primarily hunt live prey, many species—such as fish eagles, vultures, and condors—also scavenge and eat carrion.