The T-rex had feathers, hollow bones, and was most likely warm blooded

>T-rex turned into a bird?
No
>related to other species that eventually became birds?
Yes

T-rex is extinct. You want to look at the smaller theropods that survived the KT extinction event.

That's like saying mammals are related to dinosaurs seeing as mammals are derived from several species of mammal-like dinosaurs.

Yes, in the sense that we modern humans are reptiles.

And absolutely not surprising.

Technically speaking, all birds are indeed dinosaurs, but most dinosaurs are not birds. It has to do with the fact that birds as we know them (class Aves) are a monophyletic clade contained within the larger Diosauria and Archosauria clades.

So, it's inaccurate to call T-rex a bird, since that represents a polyphyletic group. Although they share many similar characteristics, birds are defined by more than just feathers, hollow bones, and endothermy, including a keeled sternum, toothless beak, tail fan, and loss of leg feathers.

Just birds, and dinosaurs(and thus birds) are in the larger group of reptiles

Its funny how little we know about dinosaurs.

.. And how much money the Jews make off of them.

Birds are reptiles

>come from t-Rex
Probably not, they may be related to the ancestors of birds but I don't think they're the direct ancestors themselves.

>mammals are derived from several species of mammal-like dinosaurs
No