Blue iguana

"Blue Iguana" redirects here. For other uses, see Blue Iguana (disambiguation).

Blue iguana
A male in the Queen Elizabeth II Botanic Park, Grand Cayman
CITES Appendix I (CITES)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Iguania
Family: Iguanidae
Genus: Cyclura
Species:
C. lewisi
Binomial name
Cyclura lewisi
(C. Grant, 1940)
Synonyms
  • Cyclura macleayi lewisi
    C. Grant, 1940
  • Cyclura nubila lewisi
    (C. Grant, 1940) Schwartz & R. Thomas, 1975 [2]
  • Cyclura lewisi
    (C. Grant, 1940) F.J. Burton, 2004 [3]

The blue iguana (Cyclura lewisi), also known as the Grand Cayman ground iguana, Grand Cayman blue iguana or Cayman Island rock iguana, is an endangered species of lizard which is endemic to the island of Grand Cayman. It was previously considered to be a subspecies of the Cuban iguana, Cyclura nubila, but in a 2004 article Frederic J. Burton reclassified it as a separate species because according to him the genetic differences discovered four years earlier between the different C. nubila populations warranted this interpretation. The blue iguana is one of the longest-living species of lizard (possibly up to 69 years).

The preferred habitat for the blue iguana is rocky, sunlit, open areas in dry forests or near the shore, as the females must dig holes in the sand to lay eggs in June and July. A possible second clutch is laid in September. The blue iguana's herbivorous diet includes plants, fruits, and flowers. Its color is tan to gray with a bluish cast that is more pronounced during the breeding season and more so in males. It is large and heavy-bodied with a dorsal crest of short spines running from the base of the neck to the end of the tail.

The iguana was possibly abundant before European colonization; but fewer than 15 animals remained in the wild by 2003, and this wild population was predicted to become extinct within the first decade of the 21st century. The species' decline is mainly being driven by predation by cats and dogs, and indirectly by reduction in suitable habitat as fruit farms are converted to pasture for cattle grazing. Since 2004, hundreds of captive-bred animals have been released into a preserve on Grand Cayman run by a partnership headed by the Durrell Wildlife Conservation Trust, in an attempt to save the species. At least five non-profit organizations are working with the government of the Cayman Islands to ensure the survival of the blue iguana.

  1. ^ a b Burton, F.J. (2012). "Cyclura lewisi". IUCN Red List of Threatened Species. 2012: e.T44275A2994409. doi:10.2305/IUCN.UK.2012.RLTS.T44275A2994409.en. Retrieved 12 November 2021.
  2. ^ Schwartz, Albert; Thomas, Richard (1975). Carnegie Museum of Natural History Special Publication No. 1 — A Check-list of West Indian Amphibians and Reptiles. Vol. 1. Pittsburgh, Pennsylvania: Carnegie Museum of Natural History. p. 113. doi:10.5962/bhl.title.123681.
  3. ^ Species Cyclura lewisi at The Reptile Database . www.reptile-database.org.