The most advanced and abundant, and the last appearing of land birds are the little passerines, the crows, robins, spanows, and myriads of other songbirds we see outside our windows.Walking dinosaur costume First appearing in the latest Oligocene and early Miocene, about twenty-five million years ago, the living species number some 5000. With fossils included the total must be much higher, and far in excess of any other archosaur group. So in a sense, songbirds are the most successful dinosaur to date, although the predatory raptors, especially, are experiencing intense stress these days. The next 100 million years and beyond will see many more fantastic things-if we humans only find a way not to interfere with the health and development of the world avafauna.
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