Iguana Negra, (Ctenosaura similis) Black Ctenosaur, Garrobo

Black Iguanas are common in the vegetation along the beach and around the biological station at Ostional. They prefer lowland dry and moist forests in open and disturbed sites. They occur in the entire Pacific coastline of Costa Rica in areas with sandy beaches.

Ctenosaus of all ages and sexes are territorial. Head-bobbing is used to display territorial rights. Females produce one clutch a year with the clutch size varying from 12-88 eggs, correlated with the size of the female.

During the rainy season adults primarily feed on vegetation. In the dry season their diet consists of flowers, fruit, insects, spiders, marine crabs, rodents, bats and lizards. They also eat eggs of their own species.

Info Source: The Amphibians and Reptiles of Costa Rica - A Herpetofauna between Two Continents between Two Seas, Jay M. Savage