. Animal biology. Biology; Zoology; Physiology. A, Rattlesnake, Crotalis durissus; B, Cobra, Naja Iripudians (From Newman, after Lydekker.) Water-moccasins, and Cobras are among the most notorious in this respect. However, many species crush their prey as do the Boa-constrictors, Pythons, and Kingsnakes. (Figs. 83, 230, 231.) D. Birds The Birds, constituting the class Aves, are the warm-blooded (homothermal) animals that have made the air their own by the development of fore limbs into wings, scales into an insulating blanket of feathers, and other bodily adaptations. And not the least of thei
. Animal biology. Biology; Zoology; Physiology. A, Rattlesnake, Crotalis durissus; B, Cobra, Naja Iripudians (From Newman, after Lydekker.) Water-moccasins, and Cobras are among the most notorious in this respect. However, many species crush their prey as do the Boa-constrictors, Pythons, and Kingsnakes. (Figs. 83, 230, 231.) D. Birds The Birds, constituting the class Aves, are the warm-blooded (homothermal) animals that have made the air their own by the development of fore limbs into wings, scales into an insulating blanket of feathers, and other bodily adaptations. And not the least of their progress is probably due to instinctive care of their eggs and young. That Birds are an offshoot from the Reptilian stock, probably the Dinosaurs, is attested by the fossil remains of a Bird, known as Archaeopteryx, with characteristic feathers but lizard-like tail and teeth. (Figs. 232, 233.) The Birds to-day form a remarkably homogeneous group, prob- ably due to restrictions imposed by the mechanical problems in-. 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 Woodruff, Lorande Loss, 1879-1947. New York The Macmillan company
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