BIRDS OF PREY 207 intelligence and curious ways and extraordinary longevity the stories are legion. Next come the owls, of which there are some two hundred species distributed all over the globe. THE CONCAVE HORNBILL Following them are the vultures, eagles, hawks and kites and falcons, amounting to some five hundred species, most of them strong and cruel in beak and claw ; the series from the barn-owl to the osprey being often grouped as birds of prey.