Cyclura Iguana Photos
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Sister Isles iguana
(cyclura nubila caymanensis)
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Estimated population remaining in the wild: 1,500

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A close relative of the Cuban iguana, the Sister Isles Iguana is native to two islands to the south of Cuba, Cayman Brac and Little Cayman. Populations have declined precipitously in recent times, with fewer than 50 individuals remaining on Cayman Brac. Threats include habitat destruction due to road construction and rapid development for tourists, predation by dogs and cats, disturbance of coastal nesting areas, and road kills. Large and highly sexually dimorphic, body length in males to 22.5 in (570 mm).

Distribution: Cayman Islands

Size: Males to 570mm SVL Females to 472mm SVL

Status: I.U.C.N. Red List - Critically Endangered Only a very small population (<50) exists on the larger (38km2) of the two islands where this iguana is found.

Legal Status: U.S. Endangered Species Act - Threatened C.I.T.E.S. - Appendix I

Priority Activities: Plans in the 1980's to construct the world's largest oil transshipment terminal on one of the islands have, fortunately, been "indefinitely postponed". Future development of the smaller island should be restricted. Every effort should be made to bring the feral cat population under control. Additional imports of domestic animals to the islands should be prohibited. Additional studies are needed to determine population status, reproduction, natural history and genetic variation between island populations.

Number Remaining: Estimated at 1,500 (very few purebred animals in captivity).