Overview
The Jamaican Iguana (Cyclura collei) is Jamaica’s largest native terrestrial vertebrate and one of the rarest, most celebrated reptile conservation resurrection stories in the world. Believed to have gone completely extinct in the mid-20th century due to the introduction of invasive Indian mongooses, a tiny surviving colony was miraculously rediscovered in 1990 deep in the rugged, inhospitable Hellshire Hills. Functioning as an indispensable seed disperser for native tropical dry forests, this noble rock iguana reigns as a living symbol of Caribbean wildlife recovery.
Biology and Physical Characteristics
The morphological anatomy of Cyclura collei is engineered for surviving in harsh, arid limestone karst landscapes. Its robust body is cloaked in rough, keeled scales ranging from slate gray and olive-green to earthy reddish-brown, accented by deep turquoise and copper tints along the shoulders and throat. A prominent dorsal crest of spiny enlarged scales runs continuously from the nape down the spine, and mature males develop enlarged jowls and a heavy muscular throat dewlap used for dominance displays.
Behavior and Ecology
Jamaican iguanas are diurnal, peaceful herbivores that spend their mornings basking atop razor-sharp limestone pinnacles before browsing on native foliage, fruits, and flowers. By dispersing intact seeds throughout dry karst forests, they perform an irreplaceable ecological service maintaining tropical plant diversity. Breeding occurs in early summer, with females undertaking strenuous overland migrations to communal nesting sites located in rare, deep pockets of red soil trapped inside limestone sinkholes, fiercely guarding their nests for several days after laying up to 20 eggs.
Conservation and Human Impact
Critically Endangered on the IUCN Red List, the Jamaican iguana faced near-extinction from predation on juveniles by invasive Indian mongooses and feral cats, alongside illegal charcoal burning that destroys mature dry forests. An internationally acclaimed head-start program organized by the Hope Zoo, the University of the West Indies, and international partners has reared and reintroduced hundreds of young iguanas back into predator-controlled core sanctuaries, dramatically rebounding the wild population.
Interesting Factoid
The Jamaican iguana was officially presumed extinct for nearly forty years until 1990, when a hunter’s dog chased a large lizard into a hollow limestone sinkhole in the remote Hellshire Hills, revealing the species was still alive.
Last updated: October 2026