Guanaco blood packs four times the red cells of ours
Lama guanicoe, the wild cousin of the llama, thrives on Andean slopes to four thousand metres. A teaspoon of its blood holds about sixty-eight million red cells—four times a human count—letting it graze thin air while fog-fed lichens sustain desert herds where rain may fail for decades.
Quechua wanaku named the species; young are chulengos. Adults stand roughly 1.0 to 1.3 metres at the shoulder, stretch 2.1 to 2.2 metres long, and weigh 90 to 140 kilograms, with cinnamon coats, grey faces, and thick neck skin that resists predators and supplies Bolivian shoe leather. They are among South America's largest land mammals today, peer to tapirs and spectacled bears. Herbivores like camels, they lightly chew then ruminate through glandular forestomachs. Soft undercoat fibres run about 16–18 micrometres, second only to vicuña wool in regional luxury ranking.
As of 2016 estimates, 1.5 to 2 million remain—mostly in Argentina—yet that is only three to seven percent of pre-conquest numbers. Chile's Tierra del Fuego stock is the country's sole non-endangered population; 13,200 were legally hunted there between 2007 and 2012. Torres del Paine herds rose from 175 in 1975 to 3,000 by 1993. Family troops hold a dominant male with females and young; bachelor bands may reach fifty. They sprint about 56 to 64 kilometres per hour and spit to nearly 1.8 metres when pressed.
Molecular work in 2001 confirmed guanacos as llama parents, with later alpaca hybridization. Mapuche on Mocha Island independently bred the chilihueque for wool and ploughing until seventeenth-century Old World livestock replaced it. In the Atacama, coastal fog oases let them eat cactus flowers and sponge-like lichens. Pumas hunt them; on Tierra del Fuego, culpeo foxes filled the empty niche after 2007 observations, met by cooperative shield circles around calves. Fence entanglement still kills yearlings at higher rates than adults across Patagonia.
Source: Guanaco
