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Weighing 20–27 kilograms (44–60 lb), the greater rhea is the largest native bird in the Americas. [4] In the wild, the greater rhea has a life expectancy of 10.5 years. [5] It is also notable for its reproductive habits, and for the fact that a population has established itself in Northern Germany in recent years. [6]
Most taxonomic authorities recognize two extant species: the greater or American rhea (Rhea americana), and the lesser or Darwin's rhea (Rhea pennata). The International Union for Conservation of Nature (IUCN) classifies the puna rhea as another species instead of a subspecies of the lesser rhea. The IUCN currently rates the greater and puna ...
Of the two extant species of rheas recognized by the IUCN Red List, as of 2022, Rhea americana is listed as near threatened, [6] while Rhea pennata is listed as least concern. [7] From 2014 to 2022, the IUCN recognised Rhea tarapacensis as a separate species, and listed it as near threatened in its last assessment in 2020; [ 8 ] in 2022, it was ...
On the following day, Darwin shot a guanaco (similar to a llama) which provided them with a Christmas meal, and in the first days of January, the artist Conrad Martens shot a rhea which they enjoyed eating before Darwin realised that this was the elusive smaller rhea rather than a juvenile, and preserved the head, neck, legs, one wing, and many ...
Ostriches have only two toes, with one being much larger than the other. Cassowaries have developed long inner toenails, used defensively. Ostriches and rheas have prominent wings; although they do not use them to fly, they do use them in courtship and predator distraction. [39] Without exception, ratite chicks are capable of swimming and even ...
The Swedish naturalist Carl Linnaeus had introduced the genus Casuarius in the sixth edition of his Systema Naturae published in 1748, [12] but Linnaeus dropped the genus in the important tenth edition of 1758 and put the southern cassowary together with the common ostrich and the greater rhea in the genus Struthio.
Greater rhea, Rhea americana: Scientific classification; Domain: Eukaryota: Kingdom: ... Genus Rhea Brisson 1760; References This page was last edited on 2 ...
The genus was used by Linnaeus and other early taxonomists to include the emu, rhea, and cassowary, until they each were placed in their own genera. [1] The Somali ostrich (Struthio molybdophanes) has recently become recognized as a separate species by most authorities, while others are still reviewing the evidence. [6] [7]