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To mark the occasion, the zoo's 20-yearold male guanaco will now be called Lawson.
The Chaco or GUASUKAKA guanaco (Lama guanicoe volii) is one of the four subspecies, which would have separated from the original population at some point in the natural history of the Pleistocene, probably climate change that modified intermediate habitats, leaving an isolated population in the lower area of ?
Consequently, the effect of atypical coloration in this population of guanacos is uncertain.
Although, guanacos are not threatened on a continental scale, populations in northwestern Argentina are in a critical state because of loss of habitats, fragmentation of habitats, and illegal hunting (Baigun et al.
At present there are four camelid species in South America: llama (Lama glama) and alpaca (Lama pacos), both domesticated, and vicuna (Vicugna vicugna) and guanaco (Lama guanicoe), both wild.
Therefore, the smallest scale measurements would signify vicuna (given the absence of alpaca in the Argentine puna) whilst larger scale measurements would signify guanaco and llama.
The guanacos help keep badgers and foxes away from nesting birds on the land, and are also a big draw for ramblers.
Ms Ballington said: "Roy bought our first guanaco as a present for me five years ago.
Herds of guanaco were so numerous that the wildebeest herds of Africa pale in comparison, and they shared the arid landscape with horses that had evolved on the continent and with vast numbers of flightless birds such as the rhea.
Guanaco are also being hunted to reduce their perceived competition with the growing population of livestock.
While the ancestor of the llama is indeed the guanaco, the ancestor of the alpaca is really the vicuna, according to a 2001 genetic study by an international team including Jane C.
ONE MINUTE, GREEN INVESTOR JOHN FORGACH WAS WATCHING Argentine businessmen pitch their plan to rear guanacos, Ilama-like Andean animals whose coats, they claim, make cashmere feel like nylon.