The mystery evolved in the standing position of birds

Birds can be in the middle of the sky because of its strange bowing style. Scientists have studied the origin of this folded posture, providing a more detailed view of the development of birds.

The bird that stands and walks has a strange bow shape, with the femur held almost horizontally - unlike a man whose legs stand vertically.The method of bending helps support birds balance and move by making sure the center of gravity is above the foot . The legs of birds imprint the legacy of the dinosaurs - the first two-legged posture-developing dinosaurs in evolution since about 235 million years ago.

Birds have different ways of bending, this way of bending is seen in close-to-life species like birds and crocodiles. Birds and crocodiles belong to a diverse animal of creatures called Archosaurs , including all the dinosaurs and extinct flying reptiles known as flying lizards. The first Archosaurs, appearing about 250 million years ago, are like modern crocodiles. Although the Archosaurs are four-legged, heavy-tailed animals, they have longer limbs than crocodiles. This evolution makes them easier to move on the ground.

Scientists have proved inconsistent about how to explain the evolution of birds. Some researchers believe that this change occurs slowly in a group of dinosaurs called Coelurosaurs , which include Tyrannosaurs and raptors. Others argue that this change occurred more suddenly, starting with a few direct ancestors of dinosaurs and the origin of the flight.

CT scans of dinosaur fossil skeletons were compared to modern bird bones to learn about the evolutionary process between the two species.

To help resolve this debate, scientists discovered birds by analyzing 3D computer models of 17 Archosaurs that last about 250 million years of evolution. These include live birds, such as prehistoric chickens, Archeopteryx, four-winged birds, Microraptor hairy dinosaurs, bipedal predators, such as Velociraptor and tyrant dinosaurs, and crocodiles, though Remains distant relatives of birds.

Paleontologists have agreed for many years that the bowing posture often seen in birds has evolved to make their tails shorter, shifting their focus forward . This forces the legs to become less vertical and more bent down to keep the center of gravity more weight than the foot.

"The tail is the most obvious change, if you look at the dinosaur body," said researcher John Hutchinson, an evolutionary biologist at the Royal Veterinary University in Hatfield. "However, as we analyzed and re-analyzed and scrutinized our data, we gradually realized that everyone forgot to examine what affected the previous limb. on balance and posture, and that this effect is greater than the tail or other parts of the body ".

Since the forebears of the ancestors of the birds became bird wings, these findings could provide insight into their flight origins. Body shape changes affect the balance of this animal, and both shape and balance are important for flights. The focus of birds seems to have changed after they started making their first flights.

The ancestors of dinosaur birds may have evolved larger forebears for reasons other than to assist in flight, such as capturing prey or adapting to complex terrain.

Scientists are trying to make the most of technologies that allow accurate diagnosis of bird evolution and change the approach to experiments. Instead of looking at one or several aspects of each specimen at any given time - such as its mass, posture, bone rate and muscle anatomy - scientists hope to divide Integrating every aspect of each specimen together in computer simulations predicting the activities of the body. Such models will help reveal how these extinct animals stand up and move, and how they change over time.