Llama - Colchester Zoo, Colchester, Essex - Monday August 11th 2008.
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From Wikipedia, the free encyclopedia ~ The llama (Lama glama) is a South American camelid, widely used as a pack animal by the Incas and other natives of the Andes mountains. In South America llamas are still used as beasts of burden, as well as for the production of fiber and meat.
The height of a full-grown, full-size llama is between 5.5 feet (1.6 meters) to 6 feet (1.8 m) tall at the top of the head. They can weigh between approximately 280 pounds (127 kilograms) and 450 pounds (204 kilograms). At birth, a baby llama (called a cria) can weigh between 20 pounds (9 kilograms) to 30 pounds (14 kilograms). Llamas are very social animals and like to live with other llamas as a herd. Overall, the fiber produced by a llama is very soft and is naturally lanolin free. Llamas are intelligent and can learn simple tasks after a few repetitions. When using a pack, llamas can carry about 25%–30% of their body weight for several miles.
Llamas appear to have originated from the central plains of North America about 40 million years ago. They migrated to South America and Asia about 3 million years ago. By the end of the last ice age (10,000–12,000 years ago) camelids were extinct in North America. As of 2007, there were over 7 million llamas and alpacas in South America and, due to importation from South America in the late 20th century, there are now over 100,000 llamas and 6,500–7,000 alpacas in the US and Canada.
Classification ~ Although early writers compared llamas to sheep, their similarity to the camel was very soon recognized. They were included in the genus Camelus in the Systema Naturae of Linnaeus. They were, however, separated by Cuvier in 1800 under the name of llama along with the alpaca and the guanaco. Vicuñas are in genus Vicugna. The animals of the genus Lama are, with the two species of true camels, the sole existing representatives of a very distinct section of the Artiodactyla or even-toed ungulates, called Tylopoda, or "bump-footed," from the peculiar bumps on the soles of their feet, on which they tread. The Tylopoda consists of a single family, the Camelidae, and shares the Artiodactyla taxon with the Suina (pigs), the Tragulina (chevrotains), and the Pecora (ruminants). The Tylopoda have more or less affinity to each of the sister taxa, standing in some respects in a middle position between them, sharing some characteristics from each, but in others showing great special modifications not found in any of the other taxa.
The discoveries of a vast and previously unsuspected extinct fauna of the American continent of the Tertiary period, as interpreted by the palaeontologists Leidy, Cope, and Marsh, has thrown a flood of light upon the early history of this family, and upon its relations to other mammals. It is now known that llamas at one time were not confined to the part of the continent south of the Isthmus of Panama, as at the present day, since abundant llama-like remains have been found in Pleistocene deposits in the Rocky Mountains and in Central America. Some of the fossil llamas were much larger than current llamas. Some species remained North America during the last ice ages. North American llamas are categorized as a single extinct genus, Hemiauchenia. 25,000 years ago, llama-like animals would have been a common sight in modern-day California, Texas, New Mexico, Utah, Missouri, and Florida.
There are few groups of mammals for which the palaeontological history has been so satisfactorily demonstrated as the llama. Many camel-like animals exhibiting different genetic modifications and a gradual series of changes, coinciding with the antiquity of the deposits in which they are found, have been traced from the thoroughly differentiated species of the modern epoch down through the Pliocene to the early Miocene beds. Their characteristics became more general, and they lost those that especially distinguished them as Camelidae; hence they were classified as forms of the common ancestral Artiodactyl taxon.
No fossils of these earlier forms have been found in the Old World, leading to the hypothesis that the Americas were the original home of the Tylopoda, and that Old World camels migrated into the Old World from the Americas over the Bering land bridge. Gradually driven southward, perhaps by changes of climate, and having become isolated, they have undergone further special modifications. Meanwhile, those members of the family that remained in their original birthplace have become, through causes not clearly understood, restricted solely to the southern or most distant part of the continent.
Reproduction ~ Llamas have an unusual reproductive cycle for a large animal. Female llamas are induced ovulators. Through the act of mating, the female releases an egg and is often fertilized on the first attempt. Female llamas do not go into "heat" or have an estrus cycle.
Like humans, llama males and females mature sexually at different rates. Females reach puberty at approximately 12 months. However, males do not become sexually mature until approximately 3 years.
Mating ~ Llamas mate with the female in a kush (lying down) position, which is fairly unusual in a large animal. They mate for an extended period of time (20–45 minutes), also unusual in a large animal.
Gestation ~ The gestation period of a llama is 11 1/2 months (350 days). Dams (female llamas) do not lick off their babies, as they have an attached tongue which does not reach outside of the mouth more than half an inch. Rather, they will nuzzle and hum to their newborns.