Lifespan, longevity, and ageing
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Observations: The 2 months delayed implantation increases the pregnancy period to 11 months (Ronald Nowak 2003). In the wild, females have been estimated to live for more than 26 years (Bernhard Grzimek 1990). Little is known about their longevity in captivity. One wild born animal was about 17.3 years when it died in captivity (Richard Weigl 2005). Further studies are needed.