How many birds are there that can't fly?
Flightless birds are birds that through evolution lost the ability to fly. There are over 60 extant species, including the well known ratites (ostriches, emu, cassowaries, rheas and kiwi) and penguins. The smallest flightless bird is the Inaccessible Island rail.
Join Alexa Answers
Help make Alexa smarter and share your knowledge with the worldLEARN MORE