How many different species of flightless birds are there?

Answer

Flightless birds are birds that can not fly. There are several species of flightless birds. The most common ones include passeriformes or perching birds, ratites, anseriformes or waterfowl, podicipediformes or grebes, gruiformes and columbiformes.
Q&A Related to "How many different species of flightless birds..."
There are about 40 species living today. Please view the Related Links below for more information about flightless birds.
http://wiki.answers.com/Q/How+many+flightless+bird...
The biggest flightless birds alive today are the ostrich, the northern cassowary,the
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The number of species, or species diversity , in the U.S. is impressive. The U.S. Fish and Wildlife Service states that 12-15% of the world's approximately 9000 bird species occur
http://www.epa.gov/owowwtr1/birds/basics.html
There are over 10,000 species of birds in the world, of which 1000 have been seen in Europe. South America is the most bird-rich continent with 3200.
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