As opposed to other West Indian islands where iguanids are found, consumption of iguana meat is not widespread in Cuba.[36] Certain fishing communities do practice it for subsistence, but for the most part the animal is not eaten by Cubans.[36] According to naturalist Thomas Barbour, this is based on unfounded superstitious beliefs which suggest that the iguanas emit a dark fluid reminiscent of the black vomit of yellow fever victims when they are killed.[36][37] One of the reasons for their decline is habitat destruction caused by the overgrazing of farm animals, housing development, and the building of tourist resorts on the beaches where the animals prefer to build their nests.[3][7] Populations of iguanas suffer by the direct predation of introduced animals such as rats, cats, and dogs.[1] Feral hogs are responsible for destroying many iguana nest sites which they dig up for eggs.[1] Ant predation of iguana eggs is another threat to the species.[5]