A flightless bird is a bird that cannot fly due to evolution. There are more than 60 extant species, including the well-known ratites (ostrich, emu, cassowary, rare, kiwi) and penguins. The smallest flightless bird is the Inaccessible Island Rail (length 12.5 cm, weight 34.7 g).
Which bird can't fly?
These eight birds can't fly, but they should be envious anyway. Penguin. Emperor penguins (Aptenodytes forsteri). Falkland steamer duck. Falkland steamer duck. .. Weka. Weka is another bird in New Zealand. .. Ostrich. The mighty ostrich is really the king of birds. .. Kiwi. Kiwi. .. Kakapo. .. Takahe. .. Cassowary.8 Flightless Bird