Hyloidea
Hyloidea is a superfamily of frogs. 54% of all living frog and toad species are in Hyloidea. The superfamily Hyloidea started when the ancestor of all its frogs and toads evolved differently from the other animals in the suborder Neobatrachia. This happened at about the same time as the Cretaceous-Paleogene extinction 66 million years ago. Scientists have found some fossils from this time but not enough to tell how this event affected these animals. After this extinction event, more forests grew, so the frogs may have changed so they could climb and live in trees.