Үлкен нанды (Rhea americana)

Species of bird
Speciesbox
| name = Greater rhea
| image = Nandu Rhea americana Tierpark Hellabrunn 1. jpg
| image upright = 1.2
| image caption = Greater rhea (Rhea americana) in Tierpark Hellabrunn, Munich, Germany
| status = NT
| status system = IUCN3.1
| status ref =
| status2 = CITES A2
| status2 system = CITES
| status2 ref =
| genus = Rhea
| species = americana
| authority = (Linnaeus, 1758) Despite the delineation of this species as the "greater rhea" versus the lesser rhea, some data on body masses indicates that both species average about in weight, but even at mass parity that greater species appears larger and is taller due to its longer legs and neck, whereas the lesser rhea is more compact and more so resembles an outsized, long necked turkey in build. Elsewhere, the lesser rhea has been cited with a lower average weight of In some areas, male greater rheas weights of up to are not uncommon and even females of up to have been weighed, both weights higher than the maximum known mass for the lesser rhea. Large males can weigh up to , stand nearly tall and measure over long, although this is uncommon. In the autumn of 2018, the German population grew to 566 individuals, and hunting of the birds was allowed; additionally, the population was reduced by destroying eggs during breeding season.

Ancient humans in the Patagonia region used to hunt greater rhea, and stencils of greater rhea feet dating back to the early Holocene can be found at rock art sites such as Cueva de las Manos. The species is farmed in North America and Europe in a similar fashion to other ratites, such as the emu and ostrich. The main products are meat and eggs, but rhea oil is used for cosmetics and soaps, and rhea leather is also traded in quantity. Male greater rheas are very territorial during the breeding season. The infant chicks have high mortality in typical confinement farming situations, but under optimum free range conditions chicks will reach adult size by their fifth month.