[Scarblac]

Given how much that looks like a bird, that strongly suggests we would also recognize avian dinosaurs as birds, right?

[TomMarius]

It hasn't remained the same for all that time.

[hansbo]

For any feature this bird and other birds have in common to have come later, they would have to have evolved twice. This could be the case for some features, but is highly unlikely to be responsible for large part of the similarities.

[gpderetta]

My understanding is that non avian dinosaurs are the birds.

[IncRnd]

You may accidentally have an extra word in, "My understanding is that __non__ avian dinosaurs are the birds."

avian = related to birds

[gpderetta]

Doh! Yes the _non_ is extra.