Description

Green iguanas are large, typically green lizards, though they can sometimes be brown or almost black in color. Some adults can take on an orange or pink coloration during certain times of the year. Hatchling and young green iguanas usually have bright green coloration.

Green iguanas have a row of spikes down the center of the neck, back, and upper portion of the tail, and have dark black rings on the tail. Mature male iguanas develop heavy jowls and a throat fan (or dewlap) that are much larger than those of female iguanas. Larger throat fans can make male iguanas appear bigger, repel rivals, or warn predators. Female iguanas may choose to breed with male iguanas that have larger dewlaps. The throat fan can also help iguanas regulate body temperature.

Male green iguanas can grow to over five feet in length and weigh up to 17 pounds. Females can also reach five feet in length but usually do not exceed seven pounds. Females typically reach reproductive maturity at two to four years of age. Green iguanas typically mate in October through November in their native range, and nesting occurs on riverbanks, beaches and other sandy areas. Females dig egg chambers that may contain nearly 80 feet of interconnected tunnels and multiple entrances and lay clutches of anywhere from 14-76 eggs. Green iguanas can live up to 10 years in the wild and 19 years in captivity.

Green iguanas can live on the ground, in shrubs, or in trees in a variety of habitats including suburban developments, urban areas, small towns, and agricultural areas. They are excellent swimmers, tolerating both salt and freshwater and can submerge themselves for up to four hours at a time.