National Geographic : 1933 Jul
THE NATIONAL GEOGRAPHIC MAGAZINE Photograph from C. M. W NEW JERSEY OSPREYS MADE WISE CHOICE From their nest in an old telephone pole in Mi birds have a clear and unobstructed view of the s and easily may detect the approach of an enemy. flights. In October, 1931, in the course of a few hours, I saw there several hun dred sharp-shins drifting down with the north wind, alternately flapping their wings and sailing with pinions outstretched, passing without pause out over the waters of the lake toward the distant American shore. While there were never many in sight at one time, they passed at intervals of two or three minutes in a steadily moving stream. Elsewhere in the fall I have ob served Cooper's and sharp-shinned hawks scattered over the entire sky, moving steadily toward the south. These flights of hawks are most marked in fall, for FLIGHT METHODS VARY Flight in the hawklike birds varies con siderably, according to the kind. Eagles, the large hawks, and the vultures, both of the New and Old Worlds, have broad wings which they flap slowly. Frequently they soar with set wings, utilizing air currents rising from the heated surface of the earth, or currents generated by winds. These birds frequently soar for hours with scarcely a wing beat, turning and wheeling in the sky, often at such I:i in spring the birds seem to travel north ward over wider areas. At a number of places it is regular practice to shoot these birds for sport, and many thousands have been killed in this manner. Occasionally, >. as near Cape May, New Jersey, they are used for food. The different spe ... cies of the hawk group vary widely in the Extent of their migra tions. Some, such as Swainson's hawk, make journeys that carry them from the western Plains south into Argentina, while others, such as the sparrow hawk, may be quite sedentary except in the northern sec tions of their range. In general, birds of this group withdraw at least in part from the extreme northern areas that they in ha b i t, probably be agner and W. Boesser cause f o o d becomes OF HOME SITE scarce and difficult to ddlesex County the obtain. The gyrfal surrounding country cons, however, are typically northern, never coming far south, and rough-legged and allied hawks course over the northern plains in the greatest extremes of cold weather.