Technically, we can consider birds to be a branch of dinosaurs. But not all dinosaurs were birds.
One of the earliest dinosaurs:
Eoraptor:Eoraptor - Wikipedia
The last part has a number of links to other species alive at the time (late Triassic).
One of the earliest dinosaurs:
Eoraptor:Eoraptor - Wikipedia
The last part has a number of links to other species alive at the time (late Triassic).