Dinosaurs Connections

Aftermath of Extinction

What percentage of land animals went extinct at the end of the Cretaceous period?

At the end of the Cretaceous period, many land animals became extinct. For example, about 25 percent of all land animal families disappeared. About 56 percent of the reptiles in general died out, and 100 percent of all non-avian (bird) dinosaurs and pterosaurs became extinct.


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