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or are all birds decended from raptors?

2007-06-13 10:52:49 · 4 answers · asked by bleenus 3 in Science & Mathematics Zoology

4 answers

Modern birds do not come from (veloci)raptors (which were just giant lizards walking on two legs), but from specimens like the archaeopteryx. This is the oldest bird-like species we know, and it dates back from the time of dinosaurs. It actually has features from both birds (feathers, beak) and dinosaurs (claws). But there were other types of feathered dinosaurs, so it's hard to say which one evolved into what modern days bird...
Check the link below for more info.

Added a few hours later:
Check out the second link: They found a new bird-like dino!!!

2007-06-13 10:58:26 · answer #1 · answered by Damien 4 · 1 0

Owls didn't evolve from any kind of dinosaur, they evolved
from an earlier kind of bird. The currently accepted idea is
that the first birds evolved from some kind of bird-like dinosaur
though there is also a suggestion that they may have come
from one of the thecodonts, an earlier kind of reptile that
predated the origin of dinosaurs. The fossil record for birds
is poor, because of the fragility of their skeletons, so we may
never know which are the earliest birds or which are ancestors
of which others. The most reliable information, at present,
seems to come from molecular biology, the work of Sibley
and Ahlquist on DNA hybridization. Even this, however, is
not definitive proof of anything.

2007-06-14 11:50:38 · answer #2 · answered by Anonymous · 1 0

Birds are descended from dinosaurs but it is unlikely that archaeopteryx was a direct ancestor of birds. Rather it was a feathered dinosaur whose line probably became extinct. There are other feathered dinosaurs that have been found particularly in China that are more likely to be ancestral to birds. Archaeopteryx is, however, an excellent example of a feathered dinosaur.

Birds and dinosaurs coexisted as birds had evolved before the extinction of the dinosaurs.

2007-06-13 20:50:57 · answer #3 · answered by tentofield 7 · 1 0

All birds are descended from one common ancestor, archaeopteryx. From there they evolved and specialized. So something like an allosaurus didn't become an albatross and a velociraptor become an eagle.

2007-06-13 19:34:17 · answer #4 · answered by dishinki 2 · 0 0

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