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Ostrich eggs in a nest on a farm. The egg of the ostrich (genus Struthio) is the largest of any living bird (being exceeded in size by those of the extinct elephant bird genus Aepyornis). The shell has a long history of use by humans as a container and for decorative artwork, including beads. The eggs are not commonly eaten.
Ostrich eggs and meat have been used by humans for millennia. Ostrich oil is another product that is made using ostrich fat. Ostriches are of the genus Struthio in the order Struthioniformes , part of the infra-class Palaeognathae , a diverse group of flightless birds also known as ratites that includes the emus , rheas , cassowaries , kiwis ...
Whale shark eggs typically hatch within the mother. At 1.5 kg (3.3 lb) and up to 17.8 cm × 14 cm (7.0 in × 5.5 in), the ostrich egg is the largest egg of any living bird, [2]: 130 though the extinct elephant bird and some non-avian dinosaurs laid larger eggs.
The two extant species of ostrich are the common ostrich and Somali ostrich, both in the genus Struthio, which also contains several species known from Holocene fossils such as the Asian ostrich. The common ostrich is the more widespread of the two living species, and is the largest living bird species.
Ostrich eggshell beads, considered among the earliest ornaments created by Homo sapiens, [1] [2] represent some of the most ancient fully manufactured beads. [3] Archaeologists have traced their origins back to the Late Pleistocene , with evidence suggesting they were crafted as early as 75,000 years ago in Africa. [ 4 ]
The Somali ostrich occurs in the Horn of Africa, having evolved isolated from the common ostrich by the geographic barrier of the East African Rift. In some areas, the common ostrich's Masai subspecies occurs alongside the Somali ostrich, but they are kept from interbreeding by behavioral and ecological differences. [ 15 ]
The North African ostrich, [1] red-necked ostrich, or Barbary ostrich (Struthio camelus camelus) is the nominate subspecies of the common ostrich from West and North Africa. It has the largest average size among the subspecies of ostriches, making it the largest living bird .
Free-range eggs are considered by some advocates to be an acceptable substitute to factory-farmed eggs. Free-range laying hens are given outdoor access instead of being contained in crowded cages. Questions regarding the living conditions of free-range hens have been raised in the United States of America, as there is no legal definition or ...