 The blue iguana is found only on the island of Grand Cayman . Comparison with other Cyclura species in the region strongly suggests that there was once a coastal population of blue iguanas which was gradually displaced or extirpated by human settlements and the construction of <unk> blue iguana now only occurs inland in natural xerophytic shrubland and along the interfaces between farm clearings , roads , and gardens and closed @-@ canopy dry forest or <unk> interior population is believed to have been attracted to agricultural clearings and fruit farms which provide thermoregulatory opportunities , herbaceous browse , fallen fruit , and nesting soil , but this brought the blue iguana into contact with humans and feral animals . Females often migrate to coastal areas to nest . Blue iguanas released into the Queen Elizabeth II Botanic Park on Grand Cayman were <unk> in 2004 to determine ranges for each animal . Females were found to occupy territories of 0 @.@ 6 acres ( 2 @,@ 400 m2 ) and males an average of 1 @.@ 4 acres ( 5 @,@ 700 m2 ) with overlap in common territories , indicating that they choose to maintain a population density of four to five animals per hectare . The blue iguanas occupy rock holes and tree cavities , and as adults are primarily terrestrial . Younger individuals tend to be more arboreal . Hatchlings are preyed upon by the native snake Alsophis <unk> . The adults have no natural predators but can fall victim to feral dogs . They typically reach sexual maturity at three to four years of age . 
