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The changes from extensive forests to more open habitats, which began 8 mya, are believed to be the main driver for the evolution of giraffes. [6] During this time, tropical plants disappeared and were replaced by arid C4 plants, and a dry savannah emerged across eastern and northern Africa and western India.
The Giraffidae are a family of ruminant artiodactyl mammals that share a recent common ancestor with deer and bovids.This family, once a diverse group spread throughout Eurasia and Africa, presently comprises only two extant genera, the giraffe (between one and eight, usually four, species of Giraffa, depending on taxonomic interpretation) and the okapi (the only known species of Okapia).
The northern giraffe (Giraffa camelopardalis), also known as three-horned giraffe, [2] is the type species of giraffe, G. camelopardalis, ... Taxonomy and evolution
Giraffomorpha is a clade of pecoran ruminants containing the superfamilies Palaeomerycoidea (Palaeomerycidae) and Giraffoidea (Giraffidae, Prolibytheriidae and Climacoceratidae), of which the giraffe and okapi of the Giraffidae are the only extant members of the once-diverse clade as a result of a decline in diversity after the Miocene as a result of declines in temperatures.
A Penn State researcher has been trying to get to the bottom of the age-old question of why giraffes have long necks. Focus on research: Female giraffes drove the evolution of long necks, new ...
Angolan giraffe (G. g. angolensis), also known as Namibian giraffe Is found in northern Namibia , south-western Zambia , Botswana , and western Zimbabwe . A 2009 genetic study on this subspecies suggests the northern Namib Desert and Etosha National Park populations each form a separate subspecies. [ 8 ]
The number of giraffes has decreased by nearly 30% since the 1980s, per the Giraffe Conservation Foundation Giraffes Need Protections of Endangered Species Act After Declining Numbers, U.S ...
The South African giraffe or Cape giraffe (Giraffa giraffa [2] or Giraffa camelopardalis giraffa) is a species or subspecies of giraffe found in South Africa, Namibia, Botswana, Zimbabwe, Eswatini and Mozambique. It has rounded or blotched spots, some with star-like extensions on a light tan background, running down to the hooves.