The Lesser Antillean Iguana is a keystone species and endangered. In the Dutch Caribbean it is only found on St. Eustatius. There is a real risk that it could disappear completely from St. Eustatius. The population density of this emblematic species was assessed in 2014 and found to be dangerously low. It is under threat by invasive predators, habitat loss and hybridization with the invasive Green Iguana. A line transect method is applied in different habitat sectors. Surveys are conducted during the Iguana peak activity between 10 am and 2 pm. Current population densities have declined across all habitats since a previous survey in 2004.