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The name "rhea" was used in 1752 by Paul Möhring and adopted as the English common name. Möhring named the rhea after the Greek Titan Rhea, whose Ancient Greek name (Ῥέα) is thought to come from ἔρα (éra, "ground"). This was fitting with the rhea being a flightless ground bird.
The wings of the American rhea are rather long; the birds use them during running to maintain balance during tight turns, and also during courtship displays. Greater rheas have a fluffy, tattered-looking plumage, that is gray or brown, with high individual variation, The head, neck, rump, and thighs are feathered. [4]
With their incredible speed, size, sharp talons, and beaks, birds of prey are the most dangerous predators in North American skies. The 8 birds examined in today’s video from A-Z-Animals are not ...
Extant members are found in South America. While the IOC World Bird List and the Clements Checklist categorise Rheiformes as its own order, [3] [4] the BirdLife Data Zone includes rheas, along with ostriches, tinamous, cassowaries, emu, and kiwis, in the order Struthioniformes. [5]
They are known to attack both dogs and people. The cassowary has often been labelled "the world's most dangerous bird", [7] [8] although in terms of recorded statistics, it pales in comparison to the common ostrich, which kills two to three humans per year in South Africa. [9]
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A 2008 study of nuclear genes shows ostriches branching first, followed by rheas and tinamous, then kiwi splitting from emus and cassowaries. [23] In more recent studies, moas and tinamous were shown to be sister groups, [6] [8] [10] and elephant birds were shown to be most closely related to the New Zealand kiwi. [9]
The bird took an “unexpected” swim near a campground in Australia, wildlife officials said. Stunned beachgoers watch ‘world’s most dangerous bird’ emerge from ocean, video shows Skip to ...