The Blue Giraffe mystery extends far deeper. Together with Mtengeni he observes not just the animal in question but another giraffe with a goat-like beard, only six feet long, a green hippopotamus with pink spots, and a two-headed rhinoceros. Other creatures are so mutated their very survival is threatened, and Mtengeni is concerned about the long-term prospects of the animal population. Establishing camp in the bush, the two are separated when the warden goes out into the night for firewood and Cuff, hearing what he takes for a native woman's scream from another direction, heads off to investigate. He finds the woman, treed
Giraffe of faster evolution. The divergence of giraffe and okapi lineages dates to around 11.5 mya. A small group of regulatory genes in the giraffe appear to be responsible for the animal's stature and associated circulatory adaptations. The IUCN currently recognises only one species of giraffe with nine subspecies. In 2001, a two-species taxonomy was proposed. A 2007 study on the genetics of "Giraffa", suggested they were six species: the West African, Rothschild's, reticulated, Masai, Angolan, and South African giraffe. The study deduced from genetic differences in nuclear and mitochondrial DNA (mtDNA) that giraffes from these populations are reproductively isolated and