Birds are dinosaurs because they are in the clade dinosauria. Their closest living quadrupedal relatives by genetic distance are indeed crocodiles.
But you're right, it is the fossil record that provides the strongest evidence.
Birds are dinosaurs because they are in the clade dinosauria. Their closest living quadrupedal relatives by genetic distance are indeed crocodiles.
But you're right, it is the fossil record that provides the strongest evidence.
I meant, "we have no DNA evidence from non-avian dinosaurs".
Saying that birds have the same DNA as birds is not evidence of much of anything. :)