Thus he separates the birds of prey into three great groups - (I) the ordinary Diurnal forms, including the Falconidae and Vulturidae of the systematist of his time; but distinguishing the American Vultures from those of the Old World; (2) Gypogeranus, the secretary-bird; and (3) the owls (q.v.).
I know owls don't sing, but I didn't like the song birds as well as this guy.
In the northern mountains the ptarmigan is common, and like other creatures assumes a white winter dress; ducks and other water-fowl frequent the lakes; the golden eagle, certain buzzards and owls are found, and among smaller birds the Lappland bunting (Plectrophanes laponicus) may be mentioned.
Birds of prey comprise several species of hawks and owls, and a few eagles.
The largest ear-opening is met with in the owls, with correspondingly larger folds of skin, the function of which is less that of protection than, probably, the catching of sound.