question of the day: how many birds can't fly?

Why do you ask?
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Blu, in the video Rio, says that there are 40 birds that can't fly.

I looked it up and found the there are NINE birds that can't fly.
Being challenged by my son, I looked into this further and discovered the Blu is sorta correct. :) Answers.com gives us this.

Answer: NOTE: 6 are extinct. removing those ones, I counted 35 but two of them are NEARLY flightless. So there you have the question of the day answered.

Ratites

Ostrich
Emu
Cassowaries
Kiwis
Rheas

Podicipediformes (Grebes)
Junin Flightless Grebe
Titicaca Flightless Grebe

Pelicaniformes (Pelicans, Cormorants, et al)
Flightless Cormorant

Sphenisciformes (Penguins)
Penguins

Anseriformes (Waterfowl)
Magellanic Flightless Steamer Duck
Falkland Flightless Steamer Duck
White-headed Flightless Steamer Duck
Auckland Island Teal
Campbell Island Teal

Gruiformes (Cranes, Rails)
Woodford's Rail (probably flightless)
Weka
New Caledonian Rail
Lord Howe Woodhen
Calayan Rail
New Britain Rail
Guam Rail
Roviana Rail ("flightless, or nearly so" [Taylor 1998])
Snoring Rail
Inaccessible Island Rail
Henderson Island Crake
Invisible Rail
New Guinea Flightless Rail
Takahe
Samoan Wood Rail
Makira Wood Rail
Gough Island Moorhen
Kagu
Tasmanian Native-hen

Psittaciformes (Parrots)
Kakapo
Broad-billed Parrot (extinct)


Columbiformes (Pigeons, Doves)
Dodo (extinct)
Rodrigues Solitaire (extinct)
Viti Levu Giant Pigeon (extinct)


Caprimulgiformes (Nightjars)
New Zealand Owlet-nightjar (extinct)


Passeriformes (Perching Birds)
Stephens Island Wren (extinct)


Galliformes (Wildfowl)
Silkie
Domestic turkey

Read more: http://wiki.answers.com/Q/What_are_the_40_species_of_birds_that_can%27t_fly#ixzz1VafjPVVo