. Reptiles and birds. A popular account of the various orders; with a description of the habits and economy of the most interesting. Birds; Reptiles. 188 INTEODUOTOEY CHAPTEE. from which is distilled the oily substance with which they lubri- cate their plumage. These receptacles are known as the uropygial glands. On the lower surface is a layer of cellular tissue con- taining a similar fluid, which seems to be connected with the growth of the feathers. The feet of birds are as varied in different species as are their wings. In birds of prey the claws are powerful and hooked. In some the foot i
. Reptiles and birds. A popular account of the various orders; with a description of the habits and economy of the most interesting. Birds; Reptiles. 188 INTEODUOTOEY CHAPTEE. from which is distilled the oily substance with which they lubri- cate their plumage. These receptacles are known as the uropygial glands. On the lower surface is a layer of cellular tissue con- taining a similar fluid, which seems to be connected with the growth of the feathers. The feet of birds are as varied in different species as are their wings. In birds of prey the claws are powerful and hooked. In some the foot is flat and the claw straight and adapted for walking (Figs. 56, 57, 58). The great toe is generally the strongest,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Figuier, Louis, 1819-1894; Gillmore, Parker, ed. Springfield, Mass. , W. J. Holland
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Keywords: ., bookcentury1800, bookdecad, booksubjectbirds, booksubjectreptiles
