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Page:Popular Science Monthly Volume 44.djvu/615

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INDUSTRIES OF ANIMALS.

birds of prey. The eyrie generally consists of a mass of dry branches which cross and mutually support one another, constituting a whole which is fairly resistant.

Even these primitive nests are not, however, without more complicated details of interest. Thus Mr. Denis Gale wrote to

PSM V44 D615 The stickleback and its nest.jpg
Fig. 4.—The Stickleback and its Nest.

Bendire concerning the golden eagle in America: "Here in Colorado, in the numerous glades running from the valleys into the foothills, high, inaccessible ledges are quite frequently met with which afford the eagles secure sites for their enormous nests. I know of one nest that must contain two wagon-loads of material. It is over seven feet high, and quite six feet wide on its upper sur-