Alquma Vs Ostrich | Basit Ali Vlog

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Alquma Vs Ostrich | Basit Ali Vlog

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Struthio is a genus of birds in the order Struthioniformes, whose members are the ostriches. It is part of the infra-class Palaeognathae, a diverse group of flightless birds also known as ratites that includes the emus, rheas, and kiwis. There are two living species of ostrich: the common ostrich and the Somali ostrich.[2] They are large flightless birds of Africa who lay the largest eggs of any living land animal. With the ability to run at 70 km/h (43.5 mph), they are the fastest birds on land. They are farmed worldwide, particularly for their feathers as they are used as decoration and feather dusters. Their skin is also used for leather products. Ostriches are notable for being the heaviest living birds.

The earliest fossils of ostrich-like birds are Paleocene taxa from Europe.[5] Palaeotis and Remiornis from the Middle Eocene and unspecified ratite remains are known from the Eocene and Oligocene of Europe and Africa. These may have been early relatives of the ostriches, but their status is questionable, and they may in fact represent multiple lineages of flightless paleognaths.[5][6] The earliest fossils from this genus are from the early Miocene (20–25 mya [million years ago]) and are from Africa, so it is proposed that they originated there. Then by the middle to late Miocene (5–13 mya) they had spread to Eurasia.[7] By about 12 mya they had evolved into the larger size of which we are familiar. By this time they had spread to Mongolia and later southern Africa.[8] While the relationship of the African fossil species is comparatively straightforward, many Asian species of ostrich have been described from fragmentary remains, and their interrelationships and how they relate to the African ostriches are confusing. In China, ostriches are known to have become extinct only around or even after the end of the last ice age; images of ostriches have been found there on prehistoric pottery and petroglyphs.[9][10][11] Struthio ostriches once co-existed with another lineage of flightless didactyl birds, the eogruids. Though Olson 1985 classified these birds as stem-ostriches, they until recently were universally considered to be related to cranes, any similarities being the result of convergent evolution. More recent analysis, however, has once again linked the ostriches to the eogruids.[12] Competition from ostriches has been suggested to have caused the extinction of the eogruids,[13][14] though this has never been tested and both groups do co-exist in some sites.[15]

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