 The blue iguana is listed as endangered on the IUCN Red List . The population is restricted to the eastern interior of Grand Cayman , where it had been reduced to a critically low level , only three animals having been observed before the survey in 1988 . The range of the blue iguana has contracted significantly over the past 25 years , with many sites once populated now showing no signs of iguanas . Surveys in 2003 indicated a total population in the range of 5 – 15 individuals . By 2005 the unmanaged wild population was considered to be functionally extinct . The species is one of the most endangered animals on Earth . A further blow to the dwindling population came in May 2008 when six individuals were found butchered in a nature preserve . 
