Which dinosaurs are believed to have evolved into birds?

terradactyl

First, lets clarify that it was *NOT* the pteranodons (like the pterodactyls). The only thing they have in common with birds is that they could fly. But that would be like concluding that humans evolved from T. rex because they walk on two legs. Pteranodons are structurally quite different from any modern flying animal (like birds or bats).

The evidence is that birds evolved from a branch of the therapod dinosaurs known as the Coelusaurs ... branched into three main groups: One branch went on to include some of the largest dinosaurs, the Tyrannosaurs (including T. rex); a second went on to include some of the smallest dinosaurs, he Maniraptora (which includes archaeopteryx, and eventually the Aves (birds); and a third (Ornithomimosaurs) that don't concern us here.

So the closest *living* relative of the T. rex are the birds (which includes chickens). But it is not true that the closest *dinosaur* relative of the chicken is the T. rex.

Birds are believed to have evolved from theropod dinosaurs, the group that includes T. rex. BTW, it was not the case that it was concluded that chickens were the closest living relative of dinosaurs, rather researchers were able to extract collagen from a T rex bone and found it the most similar to a chicken's collagen. What this did was to lend additional evidence that bird are dinosaurs.

The Mesozoic flying reptiles are not dinosaurs, although they are closely releted to dinosaurs. Don't be misled by the fact that both have wings--they are contstructed differently and are analogus, not homologus.

wl

. N O ! - in no way - - Birds are birds, and reptiles are reptiles, and on no account the twain shall meet. The archaeopteryx became Debunked (1985). even though no flow-species (a million/2 of one species and a million/2 of yet another) had ever been stumbled on, something on the fringe of it were got here upon. As suggested before, in 1861 a fossilized feather became stumbled on interior the limestone deposits in Solnhofen, Germany (close to Eichstatt). It became seen powerful because of the fact it reportedly got here from the previous due Jurassic strata—and there have been no longer meant to be any birds decrease back then. quickly yet another fossil became presented on the industry (constantly from the proprietors of the same quarry). It became a poultry with feathers, with the top and neck lacking. The British Museum paid plenty for it. So, in 1877, yet another poultry with feathers became presented on the industry—and this one regarded like it would have the top of a small dinosaur! In 1985, six preferable scientists, including *Fred Hoyle, examined the fossil—and located it to be a hoax. . . .

Individuals don't evolve. Populations evolve. And any 2 species must share a common ancestor. Based on the information you provided, you would say that chickens and pteranadons shared a more recent common ancestor than pteranadon and t-rex. but t-rex and chickens share a more recent common ancestor than t-rex and penguins.

Nothing of what you have been saying is inconsistent.

The best way for you to understand this is to look up cladistics or cladograms.

The 90 million-year-old reptile belongs to the same sickle-clawed group of dinosaurs as Velociraptor and feathered dinosaurs from China.

Buitreraptor gonzalezorum, from the Neuquén Basin in central Argentina may provide tantalising evidence that powered flight evolved twice.

Then later: Archaeopteryx (from Ancient Greek ἀρχαῖος archaios meaning 'ancient' and πτέρυξ pteryx meaning 'feather' or 'wing'; pronounced /ɑrkiˈɒptərɪks/ "ar-kee-OP-ter-iks") is the earliest and most primitive bird known. It lived in the late Jurassic Period around 155–150 million years ago in what is now southern Germany. In German, Archaeopteryx is also known as the Urvogel, a word meaning "original bird" or "first bird". Although the name originated in Germany, it is also used in English-speaking countries.

There's quite a debate on this subject.

The theropod-to-bird school believe birds evolved from theropod dinosaurs which developed feathers for insulation, and later developed flight.

Others believe it was thecodonts, who were tree dwellers; these people believe the "ground up" type of evolution was impossible.

I didn't hear of that one. I hate to be around those chickens!! There is still controversy if ANY dinosaur was the forerunner of a bird, but rather some closely-related reptile.

The only dinosaurs that evolved into birds were the smallest of them that survived "The Great Die Off".

Towards the end of dino civilization a lot of the dinos where predecessors to birds, and most didn't have wing. They started to get feathers like the Archaeopteryx. Check it out on wikipedia. It almost looks like a duck.

i don't understand evolution enough to say, It seems like most dinos evolved into something at the far end of the spectrum