 Populations of slow loris species , such as the Bengal and Sunda slow loris , are not faring well in zoos . In 2011 , the International Species Information System ( ISIS ) had only 11 and 53 specimens ( respectively ) on file from reporting zoos worldwide . In North American zoos , for instance , several of the 29 captive specimens in 2008 were hybrids that could not breed while most were past their reproductive years , and the last captive birth was in 2001 at the San Diego Zoo . Only three Javan slow lorises were kept in zoos in 2011 according to ISIS . Pygmy slow lorises are doing better , with 100 specimens reported from zoos worldwide in 2011 . In North American zoos , for instance , the population has grown to 74 animals between the time they were imported in the late 1980s and 2008 , with most of them born at the San Diego Zoo . 
