Are there any naturally occurring vertebrates that can fly as juveniles but lose the power as adults? Do we have reason to believe that there are early or flightless birds that passed through a stage like that? Because that would be interesting.
Are there any naturally occurring vertebrates that can fly as juveniles but lose the power as adults? Do we have reason to believe that there are early or flightless birds that passed through a stage like that? Because that would be interesting.