assortment of sharp, backward-curving teeth in its long beak. One other species of flying reptile is of special interest, because it has developed something resembling feathers, in a many-colored crest down its long neck. They appear only on the mature reptile; the young are completely naked.Some 100,000,000 years ago the land-living reptiles were almost completely wiped out by one of the smallest of their own family, which adopted the easiest method of making a living: eating the eggs of its larger relatives. The larger forms almost completely disappeared, and those that survived (such as the Lithian allosaur) are now almost as rare as the terrestrial elephant (as compared for instance, with the many elephant species of the Pleistocene.) The smaller forms survived better, but are not nearly so abundant now as they once were.The dominant species is an exception. The female of this species has an abdominal pouch in which the eggs are carried until they hatch. This animal is about twelve feet tall at the crown, with a head shaped for bifocal vision. One of the three fingers on the free forelimb is an opposable thumb.
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