page_title: Thorold's deer
section_title: Reproduction
hierarchical_section_title: Thorold's deer / Reproduction
caption_attribution_description: English: Thorold's deer (Cervus albirostris) at the Rosamond Gifford Zoo, Syracuse, New York.
context_page_description: Thorold's deer is a threatened species of deer found in grassland, shrubland, and forest at high altitudes in the eastern Tibetan Plateau. It is also known as the white-lipped deer for the white patches around its muzzle.
  This deer fills an ecological niche similar to the Tibetan red deer. It was first scientifically described by Nikolai Przhevalsky in 1883, and the first specimens were procured by G. W. Thorold, after whom the species is named. As of early 2011, more than 100 Thorold's deer are kept in ISIS-registered zoos, and in 1998 it was estimated that about 7000 remain in the wild.
context_section_description: The rut occurs between September and November, when herds containing both males and females become more common. Such herds consist of several males, each maintaining a small harem of females that they protect from other males. Males compete with one another in a manner similar to other deer - wrestling with antlers, scent marking, visual displays, and grunting warning sounds. Mating consists of a single rapid thrust.
  The female gives birth to a single young after a gestation period of 220 to 250 days, typically in either May and June. Shortly before giving birth, the mother locates a secluded den, often in bushes or shrubby cover. The calves are born with white spots, and able to stand within about 40 minutes of birth. Initially, the mother protects them by moving them between a number of different locations, only visiting them twice a day to allow them to suckle. After about two weeks, they rejoin the herd.
  The calves' spots begin to fade after around six weeks, and they attain the full adult colour by the end of their first year. They become sexually mature during their second or third year, although males are rarely successful in the rut until they are at least five years old. Thorold's deer have been reported to live up to 21 years in captivity, but probably do not survive for more than 12 years in the wild.
caption: Female Thorold's deer
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