It has usually been said that the list of birds used in hawking includes only two main divisions--the long-winged hawks, as falconers call them, known to naturalists under the name of "falcons"; and the short-winged hawks, to which the men of science apply specially the name of hawks. This ornithological classification of falcons on the one hand and hawks on the other, is not a very happy one; for in the general public estimation, as well as in falconers' phraseology, every falcon is a hawk, although every hawk may not be properly called a falcon. The one term is of classic, and the other of Teutonic origin; and it was too late, when books about birds first began to be written scientifically, to attempt to establish a hard-and-fast difference between words which had already passed current for centuries as meaning pretty much the same thing. Moreover, hawking, which, if the naturalists' view of the matter were accepted, ought to be concerned, like the French _autourserie_, with the short-winged hawks only, has long been considered in England a mere synonym for falconry, which also, if interpreted strictly according to the ornithological theory, ought to be regarded as dealing with the long-winged species. The two-fold division, however, no matter whether it is into falcons and hawks, or into short-winged and long-winged hawks, seems to be insufficient and unsatisfactory. For eagles, which have been, and still are, extensively used in a sport for which the only English names are hawking and falconry, remain unincluded in the two usually accepted classes. No eagle can properly be called either a hawk or a falcon; and in order to find a place for them amongst the birds trained and flown at quarry, it seems necessary to institute a third class. What order of precedence should be taken by such new class is a matter of small consequence. In symmetry of shape, in its mode of flying, its character, and its tastes, the eagle is as inferior to the true hawk as the latter has always been deemed to be to the true falcon; and in this work, as in others on falconry, the first place has been retained for the long-winged hawks, and the second for the short-winged, leaving a third place for what little it seems necessary to say about such eagles as we know to have been flown at game.