Ey you wanna dish out some discourse on the big birds of the post K-T world? Specifically the unrelated terror birds, The Phorusrhacids and the less terrible Gastornids?
It’s generally agreed that the vast majority of dinosaurs went extinct after he Cretaceous period. With this extinction, dinosaurs were removed from a wide variety of ecological niches, one of them being “land-based macropredator”. After the Mesozoic Era ended, the time when dinosaurs reigned as land predators was over.
Or was it?