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Which Are the World’s Biggest Birds?

Weight is a hindrance to flight, and so the largest birds are flightless. The champions are the African ostrich, the South American rhea, the Australian emu, and the cassowary of Australia and New Guinea. Except for the cassowaries, which are jungle dwellers, all live in grasslands or semi-deserts.

Ostriches are the record setters. With a height of up to 8 feet and a weight of as much as 300 pounds, the male ostrich — females are smaller — is taller than a human and outweighs most of us. Ostriches are also the fastest runners among birds; over short distances, they have been clocked at 40 miles an hour.

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