Rhea (bird) males of "R. americana" can reach tall at the head, at the back and can weigh up to , The lesser rhea is somewhat smaller as they are only tall at the back. 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 18 to 22 horizontal plates on the front of it. They also store urine separately in an expansion of the cloaca. Rheas are from South America only and are limited within the continent to Argentina, Bolivia, Brazil, Chile,
South American Bird Fair South American Bird Fair The South American Birdwatching Fair is an annual event for birdwatchers, held every year in a different country of the continent. It is described as the birder's principal meeting in South America, with people from all the world. Lovers of wildlife in general and Birdwatching in particular can find in the fair a space for networking and sharing talks, workshops, seminars and birding trips. Each year's programme includes birding themes in general, recent scientific findings and presentations in many related themes. A large number of suppliers of binoculars, cameras, books, clothing and other birdwatching equipment, artists