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Why didn't smaller pterosaurs survive the extinction?

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Pterosaurs were already struggling from competition with birds. All but the largest pterosaurs we're already in decline for at least ten million years before the K-T extinction, so it was really just the final blow. read more

According to one theory, most of the land animals that that survived the Cretaceous-Paleocene Extinction (CPE) were underground when that bolide hit. The bolide created a firestorm all over the world. Some animals in burrows lived. This would have included some small birds and dinosaurs. Maybe thre were no such pterosaurs. read more

As I understand it, pterosaurs died out before the end Cretaceous extinction event, they were out competed by early bird species, so they went extinct before the non avian dinosaurs, and thus could not have survived the Cretaceous extinction event. read more

Dinosaurs, pterosaurs and marine reptiles were wiped off the face of the earth by the K/T Extinction--but their close cousins, the crocodiles, managed to survive. read more

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