. [Articles about birds from National geographic magazine]. Birds. m .. F]-nio by J. il. Schreck \ TERX OX ITS NEST (SEE PAGE Gj/) Tts nest, nf rccds and grasses rather eloseh' woven, is found in grass>- marshes or in vegetation in a slough. It is an ahuncUuit s]ieeies in the interior of the United States and sul)sists eliicfly on dragon flies and various aquatic insects. from iiiaimiials nn the one hand and front reptiles (in the other are more ap- parent than real. Tbns flight, the iiKist of a liird'.s gifts, is shared h\ Iiats among mammals. Egg-laying is the h
. [Articles about birds from National geographic magazine]. Birds. m .. F]-nio by J. il. Schreck \ TERX OX ITS NEST (SEE PAGE Gj/) Tts nest, nf rccds and grasses rather eloseh' woven, is found in grass>- marshes or in vegetation in a slough. It is an ahuncUuit s]ieeies in the interior of the United States and sul)sists eliicfly on dragon flies and various aquatic insects. from iiiaimiials nn the one hand and front reptiles (in the other are more ap- parent than real. Tbns flight, the iiKist of a liird'.s gifts, is shared h\ Iiats among mammals. Egg-laying is the habit of most rejitiles and of three mam- mals I the Anstralian dnekhill and the eehidnas). lint incithation b\" ;ne or both of the ])arents is peettliar to birds, though the ])\'thon is said to coil on its eggs- I'irds breathe more rapidly than either mammals or reptiles, and their pnenma- ticity, or jjower of inflating numerous air-sacs and e\'en certain bones, is tmique. The tem])erattire of birds ranges from ioo° to 1 i2°,\\'hile in mammals it reaches rove that early in the de^•ell:)pment of the class all birds had teeth. Thus we might continue the compari- son, finding that birds ha^•e no universal ]iecuharities of structure which are not jiresent in some degree in either mam- mals or reptiles, until we come to their external covering. The reptile is scaled, and so is the fish ; the mammal is haired, and so are some insects; but birds alone possess feathers. They are worn by every liird—a fit clothing for a body, which is a marvelous combinatir)n of beautv, light- ness, and strength. There is good e^'idence for the belief that birds have descended from reptilian ancestors. This evidence consists of the remains of fossil Ijirds, some of which show marked reptilian characters and, as just said, are toothed. It is unnecessar\- to discuss liere the relationship of the bird-like reptiles, but, as the most con- \incing argument in support of the theory of the re
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