 The common Green Iguana , ( Iguana iguana ) , has been introduced from Honduras and is well @-@ established on Grand Cayman as an invasive species . It far outnumbers the endemic blue iguana . No direct negative consequences of this introduction on the blue iguana are known , but the mere presence of the Green Iguana confuses public attitudes and understanding . For example , the people of the island are told that blue iguanas are endangered and rare , and when they subsequently see large numbers of the introduced Green Iguana , they do not understand the difference . 
