There's no such thing as a fish either. Unless you count whales, parrots and Kanye West as fish.

"Fish" is almost a good category, you only need to nuke a unusual branch and call it a day.

A better comparison is "Fliyers", that include most insects, most birds, bats, pterodactyls and perhaps a few gliding and kitting animals. It evolveded and disappeared a few times.

If you like trivia and British humor the podcast No Such Thing as a Fish is amazing.