Showing posts with label first bird.. Show all posts
Showing posts with label first bird.. Show all posts

Epidendrosaurus

Now, we know that the transition from reptiles to birds, there was thanks to some small theropods, hunters quickly and nimbly leaping from branch to branch to pounce upon its prey. Increasingly lighter and more agile, were those who had the most jumped protofeathers, who came to the farthest branches and so more prey. Until a jump, went to plan ... a prelude to fly like birds.

One of the clearest examples of these prehistoric animals, with characteristics of birds but without turning it was the Epidendrosaurus, whose name means "lizard on the branches." It is a small theropod maniraptor (hand robber), a taxon whose main feature is the very long, curved fingers ... a feature that served to grip tree branches.

But do not think that the change from reptile to bird was linearly which followed a straight way without errors. The evolution experienced with the species, and species were able to survive for tens of thousands of years and others not, and there is almost no such evidence. But Epidendrosaurus was very successful. In fact, this prehistoric animal lived after the first birds and thousands of years after the first bird which is known Archaeopteryx, this means that even still undergoing evolution and squeezing the characteristics that conditioned the animals, even appeared almost winged reptiles and birds flying when they appeared. The few fossils has been discovered that in the legs and tail feathers had slight marks, similar to those of Microraptor (another small thief).



If we saw now, we look like a bird more than a reptile, if we looked we would see that no beak, but a tiny little mouth full of sharp little teeth and suitable for hunting small reptiles, insects and even mammals were climbing clueless the branches of the trees in late Jurassic. We seem a small bird, it is thought that it was not larger than a dove. The only bones found are young specimens and their skeletons are as big as sparrows.

Archaeopteryx




Archaeopteryx is the oldest known bird. While the Microraptor is considered a dinosaur with feathers like a bird, Archaeopteryx is already a bird. The first bird ... Jurassic.
They are very similar, are common features of other theropods: bone thing, sharp claws, beak with small but sharp teeth and feathers, both forelimbs and hind.

But unlike Microraptor, Archaeopteryx flew better, not only was involved in planning from branch to branch. Perhaps its flight is not elegant as the an albatross or as fast as a swift, but was the first to fly. and that is a lot. Possibly its fly mode would seem very strange if we saw now. Archaeopteryx also had long feathers on the hind legs, along with feathers front, it flew in a strange mode. Some think that because of this, was more agile in flight modern birds, but their ability to fly long distances would be less.

Not very big, measuring just 35 cm, and weighed just under 500 gr. Its brain was proportionally greater than other theropods and structure of his ear and was similar to that of modern birds.

We could say that its size was similar to that of a magpie .... Consider the differences:


Incidentally, the Velociraptor, is a close relative.
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