Evolution of birds, illustration. Modern birds, such as the pigeon (bottom centre) evolved from therapod dinosaurs (upper left) that lived during the Jurassic period (around 165-150 million years ago). Primitive feathers were not adapted for flight, instead they probably provided insulation. Archaeopteryx (upper right) is widely thought to be one of the first flying dinosaurs. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / CHRISTIAN JEGOU |
Bildgröße: | 7959 px × 4147 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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