Owls belong to the order Strigiformes, constituting
200 extant bird of prey species. Most are solitary and nocturnal,
with some exceptions. Owls hunt mostly small mammals,
insects, and other birds, although a few species specialize
in hunting fish. They are found in all regions of the Earth
except Antarctica, most of Greenland and some remote
islands. Though owls are typically solitary, the literary
collective noun for a group of owls is a parliament.