The Rea or American Ostrich rheas Rhea
rheas are species of flightless ratite birds in the genus Rhea, native to South America. There are two existing species: the Greater or American Rhea and the Lesser or Darwin's Rhea. The genus name was given in 1752 by Paul Mohring and adopted as the English common name. Mohring's reason for choosing this name, from the Rhea of classical mythology, is not known. Rheas are large, flightless birds with grey-brown plumage, long legs and long necks, similar to an ostrich. These birds can reach feet ( m), and weigh up to 88 pounds (40 kg). Their wings are large for a flightless bird and are spread while running, to act like sails. Unlike most birds, rheas have only three toes. Their tarsus has horizontal plates on the front of it. They also store urine separate in an expansion of the cloaca.
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Photo credit: © 19th era / Alamy / Afripics
License: Licensed
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