Dinosaurs Can Fly
Forest residents of the Chinese province of Laonin 130 million years ago. In the front, the little four-wheeled dinosaur is a gui microraptor. Flying to the right of the cabinet is not considered birds either. There's a confusornis on the left of the branch, representing one of the birds of the evolutionary lines. It is clear that various groups of perinatal animals were trying to develop the air environment during the meal period.
Until recently, the early evolution of the birds was hardly the darkest page of the mosquitoes of the minerals. Although the latest paleontological discoveries have clarified a lot, it has not been fully read. All we know is that birds came from reptile. But which one? The direct ancestors of modern birds have never been found, and the operation and ability to fly has repeatedly emerged from the different animals of the mesosaic era. Hypothetical ancestors, if you don't mind, are pseudosukhi, ornitozuhija, pterosaurs, dinosaurs and even crocodiles. And the archaeopterics that everyone's familiar with the pictures in the schoolbook have to be removed from this list.
Birds, along with insects, are the main inhabitants of Earth ' s air spaces. Several devices allow them to climb into the sky and control their flight movements. First, special skeleton. A complicated wing can keep the body's weight in the air. His mosquito movements depend on the structure of the shoulder belt, formed by the shovel, the coracoid, the stern and the clawed. There is, for example, a three-stop opening through which the dryness of the muscle lifts the wing upwards after it falls. To keep the tail feathers on the wheel, the end of the spine formed a short and wide bone, a pigosty. Second, it helps fly birds and surgery. Flight management provides well-defined feathers: fog and roll. But there are also feathers whose purpose is different: they create a blending shape of the body of the peppers, both in the flight and in the dawning, serve a thermal shield and, as brightly coloured, help in communication between the naturals.
A archeopterics skeleton with clear feather prints. Found in 1861 in southern Germany
In addition to the birds in the vertebrals, only volatile mouses and wings can fly. But they have a fundamentally different wing structure and no feathers, which makes their flight unlike a bird. In the past, the diversity of flying and operating creatures has been enormous. In addition to the well-known pterosaurs and archaeopterics, paleontologists found a large number of unusual species that were not even suspected of existence. Animal world seems to have had no shortages in the sky.