i think it would be... an ostrich, a crocodilia, a bird, or an alligator :3
Currently, the 2 closest relatives to T. Rexs are those in the class Aves (known as Birds) and Crocodilians.
No bird is more closely related to T. rex than any other. In terms of behavior, probably the pirs most similar to T rex would be eagles as they, like Tyrannosaurus, can be apex predators. Yet this predators closest living relative today is the chicken.
How do i know the T-rex isn't alive.
Type your answer here... A t rex was alive for 3,227
A T-Rex can't be found alive, at least not a real one. They're extinct-gone forever.
Currently it is not known whether nanotyrannus was a young T. rex or a T rex relative.
Allosaurus was but it was a bit smaller and had three fingers.
The closest living relatives of T-Rex are birds. All birds, including chickens, are equally related to T-Rex. Note that birds did NOT evolve from T-rex, they evolved from small, feathered carnivorous dinosaurs.
The T rex's closest modern relitive is the chicken.
69 - 65 million years ago
A T-Rex.
Tyrannosaurus rexes have not been alive for 65,000,000 years, so no, they aren't endangered!