Is it true that all birds can fly?

Answer by  noeleenhart (37)

There are a number of flightless birds, classified by scientists as Ratites. The prime examples of these birds are the ostriches, Kiwis,Cassowaries and Emus. It seems that birds, such as the New Zealand Kiwi probably lost the ability to fly as they had few known predators. Penguins are not classified as true Ratites because they use their "wings" to swim.

Answer by  BethBirder (232)

You're correct; penguins can't fly, and they're definitely birds. There are over 40 flightless species alive today that can't fly, mostly in the Southern Hemisphere. Some of the best known include the ostrich, emu, and kiwi. Flightless birds tend to be swimmers/divers or runners. Unfortunately, because of their vulnerability, there are over 40 EXTINCT species in this category.

Answer by  cherylb (125)

Emus have underdeveloped wings are classified as birds and they do not fly. Penguins are any of various erect short legged aquatic flightless birds according to the Webster,s New Collegiate Dictionary.

Answer by  AndrewKinsey (147)

There are a few birds including, penguins, ostriches, emus, and kiwi birds that can not fly. Penguins are classified as birds. Turkeys and chickens can both fly, contrary to common belief.