Technically, this isnt true. The dinosaurs were not birds, only a few were the pre evolution of birds, but that still does not make them birds.
Confusiusornis, Hesperornis, Ichthyornis, Balaur, Jeholornis and you could even say that Archaeopteryx is the very first bird
Technically, this isnt true. The dinosaurs were not birds, only a few were the pre evolution of birds, but that still does not make them birds.
True, but birds were already present at the time and most of them didn't survive the event
Name 1 bird that was arround pre meteor
Confusiusornis, Hesperornis, Ichthyornis, Balaur, Jeholornis and you could even say that Archaeopteryx is the very first bird