(Image credit: Julian Fennessy/GCF)Giraffes are a more diverse group than once thought, with scientists recently identifying four distinct species.
Since giraffes were first described in the 18th century, these long-necked mammals were thought of as one species, with nine subspecies emerging over subsequent decades.
But researchers have discovered that giraffes are more diverse than previously suspected, thanks to extensive DNA analysis — the most comprehensive ever performed for these well-known but not very well-studied animals — which revealed four species that did not interbreed.
The physical differences between the four giraffe species aren't dramatic. But this discovery could significantly impact conservation efforts, leading to initiatives that better address needs that vary across species.
(Image credit: Julie Maher/WCS)Masai giraffes in South Luangwa National Park, Zambia. The subspecies formerly recognized as Thornicroft’s giraffe is now represented by this species.
(Image credit: Julie Maher/WCS)Masai giraffes in South Luangwa National Park, Zambia. Previously identified as a subspecies, this giraffe species is found primarily in Kenya and Tanzania, and was first described in 1898.
(Image credit: Julian Fennessy/GCF)A reticulated giraffe in Samburu National Reserve, Kenya. First identified as a subspecies in 1899, this giraffe is distributed across Kenya, Ethiopia and Somalia.
(Image credit: Julian Fennessy/GCF)A reticulated giraffe strides across the savanna in Samburu National Reserve, Kenya. Fewer than 8,700 individuals of this species remain in the wild.
(Image credit: Julian Fennessy/GCF)Northern giraffes in the Murchison Falls National Park, Uganda. This species now encompasses several subspecies: West African, Kordofan, Nubian and Rothschild's.
(Image credit: Julian Fennessy/GCF)The subspecies West African giraffe was described in 1898, and is found primarily in Niger. They are now considered to be the northern giraffe species.
(Image credit: Julian Fennessy/GCF)Angolan giraffes — now identified as the southern giraffe species — in northwest Namibia. The Angolan subspecies was described in 1903, and there are an estimated 13,000 individuals in the wild.
(Image credit: Julian Fennessy/GCF)Southern giraffe calf in the Okavango Delta, Botswana, representing the formerly recognized subspecies Angolan giraffe.
(Image credit: Julian Fennessy/GCF)Angolan giraffe drinking in the Hoanib River, northwest Namibia. The southern giraffe species is now thought to include the Angolan subspecies and the South African subspecies.
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