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Ratite chicks tend to be more omnivorous or insectivorous; similarities in adults end with feeding, as they all vary in diet and length of digestive tract, which is indicative of diet. Ostriches, with the longest tracts at 14 m (46 ft), are primarily herbivorous .
Name Binomial Name Status Distribution Heavy-footed Moa: Pachyornis elephantopus EX lived in lowlands of New Zealand's South Island Mantell's moa
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Rheas (/ ˈ r iː ə z / REE-əz), also known as ñandus [a] (/ nj æ n ˈ d uː z / nyan-DOOZ) or South American ostrich, [3] [4] are moderately sized South American ratites (flightless birds without a keel on their sternum bone) of the order Rheiformes.
Incongruences between ratite phylogeny and Gondwana geological history indicate the presence of ratites in their current locations is the result of a secondary invasion by flying birds. [14] It remains possible that the most recent common ancestor of ratites was flightless and the tinamou regained the ability to fly. [15]
Cassowaries (from Malay: kasuari [17] cognate of several related languages spoken around the Moluccas and New Guinea [18]) are part of the ratite group, which also includes the emu, rheas, ostriches, and kiwi, as well as the extinct moas and elephant birds. These species are recognised:
Rheidae / ˈ r iː ɪ d iː / is a family of flightless ratite birds which first appeared in the Paleocene. [2] It is today represented by the sole living genus Rhea, but also contains several extinct genera. [3]
All tinamous are from the family Tinamidae, so are also ratites.Unlike other ratites, tinamous can fly, although in general, they are not strong fliers. All ratites evolved from prehistoric flying birds, and tinamous are the closest living relative of these birds.