Birds of prey are so called from feeding only on animals: they have a
hooked beak, strong feet, and very sharp claws.
Some birds of this group are used in falconry, so called because several
species of falcon are employed in the sport: others, as the owls, are
used to attract small birds to the barn-floor trap, and rooks to the
decoy-hut. There seems little probability that bird-fanciers should wish
to keep such birds as these in the house. Two species, however, appear
to merit distinction, the kestril and the little owl.