Ctenosaura similis

''Ctenosaura similis'', commonly known as the black iguanaLiner, Ernest A. and Gustavo Cass-Andreu. (2008). ''Standard Spanish, English and Scientific Names of the Amphibians and Reptiles of Mexico (2nd. ed.).'' Herpetological Circular No. 38. Society for the Study of Amphibians and Reptiles. iv, 162 pp. or black spiny-tailed iguana, is an iguanid lizard native to Mexico and Central America. It has been reported in some Colombian islands in the Caribbean Sea and Pacific Ocean, and has been introduced to the United States in the state of Florida. The largest species in the genus ''Ctenosaura'', it is commonly found in areas such as grasslands and forests.

Taxonomy

''C. similis'' was first described by British zoologist John Edward Gray in 1831. The generic name—''Ctenosaura''—is derived from two Greek words: ''ctenos'' (Κτενός), meaning "comb" (referring to the comblike spines on the lizard's back and tail), and ''saura'' (σαύρα), meaning "lizard". The specific name—''similis''—is a Latin word meaning "similar to", a common description found in Linnaean taxonomy when referring to a new taxon.

Description

''C. similis'' has distinctive black, keeled scales on its tail, which gives it its common name. It is the largest member of the genus ''Ctenosaura.'' The males are capable of growing up to in length and the females are slightly shorter, at . They have a crest of long spines which extends down the center of the back. Although coloration varies extremely among individuals of the same population, adults usually have a whitish gray or tan ground color with a series of 4–12 well-defined dark dorsal bands that extend nearly to the ventral scales. Males also develop an orange color around the head and throat during breeding season with highlights of blue and peach on their jowls.

Diet and behavior

Black spiny-tailed iguanas are excellent climbers, and prefer a rocky habitat with plenty of crevices to hide in, rocks to bask on, and nearby trees to climb. They are diurnal and fast moving, employing their speed to escape predators but will lash with their tails and bite if cornered. The Guinness Book of World Records lists this as the world's fastest lizard, with a maximal sprint speed of .

They are primarily herbivorous, eating flowers, leaves, stems, and fruit, but they will opportunistically eat smaller animals (rodents, bats, frogs, small birds and smaller iguanas), eggs and arthropods. Juveniles tend to be insectivores, becoming more herbivorous as they get older. They are known to eat the fruit and live in the limbs of the manchineel, a tree highly poisonous to most other animals. González-García et al. 2009 find that abundance is highly dependent on 3 dimensional structure of landscape, tall vegetation not merely short grass.

Distribution

The black spiny-tailed iguana is native to southern Mexico and Central America, ranging from the Isthmus of Tehuantepec southward to Panama, occurring at sea level to ca. 1,320 meters elevation, but it is absent from interior highlands. Köhler, Gunther. 2008. ''Reptiles of Central America'', 2nd Edition. Herpeton, Verlag Elke Köhler, Offenbach, Germany. 400 pp. (pages 139–144) Its distribution is irregular and discontinuous on the Atlantic versant where it ranges through portions of Tabasco, northern Chiapas, Campeche, Yucatan, and Quintana Roo in Mexico, much of Belize, Guatemala, Campbell, Jonathan A. 1998. ''Amphibians and Reptiles of Northern Guatemala, the Yucatán, and Beliz''e. University of Oklahoma Press. Norman. xix, 380 pp. (pages 142–144) Lee, Julian C. 1996. ''The Amphibians and Reptiles of the Yucatán Peninsula''. Comstock Publishing Associates, Cornell University Press, Ithaca, New York. xii, 500 pp. (pages 206–208) and the northern coast of Honduras (often following rivers into interior valleys and canyons),McCranie, James R. 2018. ''The Lizards, Crocodiles, and Turtles of Honduras: Systematic, Distribution, and Conservation''. Bulletin of the Museum of Comparative Zoology, Special Publications Series, No. 2: 1-666 pp. (pages 273–281) but with only a few isolated and disjunct records southward in eastern Nicaragua, Costa Rica, and Panama. Savage, Jay M. 2002. ''The Amphibians and Reptiles of Costa Rica, A Herpetofauna between Two Continents, between Two Seas''. University of Chicago Press, Chicago, Illinois. xx, 934 pp. (pages 435–437) On the Pacific coast its distribution is continuous from extreme southeast Oaxaca and southern Chiapas, Mexico, south through Guatemala, El Salvador,Köhler, Gunther., Milan Veselý, and Eli Greenbaum. 2006. ''The Amphibians and Reptiles of El Salvador''. Krieger Publishing Company. Malabar, Florida. ix, 238 pp. (pages 113–115) Honduras, Nicaragua, Costa Rica, to the Azuero Peninsula in Panama.Köhler, Gunther. 2002. ''Schwarzleguane: Lebensweise, Pflege, Zucht''. Herpeton, Verlag Elke Köhler, Offenbach, Germany. 142 pp. (pages 110–120, & 128b)

It is also found on many Caribbean and Pacific islands including: Isla Aguada, Isla Contoy, Cozumel, and Isla Mujeres in Mexico;Alberts, Allison C., Ronald L. Carter, William K. Hays, and Emília P. Martins (Editors). 2004. ''Iguanas: Biology and Conservation''. University of California Press. Berkeley. xvi, 356 pp. (pages 34–35) Ambergris Caye, Glover's Reef, Half Moon Caye, Belize; Isla de Utila, Guanaja, Roatán, and the islands in the Golfo de Fonseca, Honduras;McCranie, James R., Larry David Wilson, and Gunther Köhloer. 2005. ''Amphibians and Reptiles of the Bay Islands and Cayos Cochinos, Honduras''. Bibliomania!. Salt Lake City, Utah. xiii, 210 pp. (pages 96–97) Isla de Maíz Grande (Corn Islands) Nicaragua; Coiba Island and Isla del Rey, Panamá; Isla San Andrés and Providencia, Colombia. Schwartz, Albert, and Robert W. Henderson. 1991. ''Amphibian and Reptiles of the West Indies: Descriptions, Distribution, and Natural History''. University of Florida Press. Gainesville. (pages 387–388) Powell, Robert, and Robert W. Henderson (Editors). 1996. ''Contributions to West Indian Herpetology: A Tribute to Albert Schwarts''. Society for the Study of Amphibians and Reptiles. 457 pp. (page 105) Its status on a few of these islands, as a native or invasive species is questionable. Some herpetologist presume dispersal to the Islas San Andrés and Providencia, Colombia occurred in the Quaternary, while another suspects these and some other insular populations are "likely" human introductions. It has been introduced and is now established in southern Florida, a few islands in the Bahamas, Malpelo Island, Colombia, and Venezuela.Barrio-Amorós, César Luis and Gilson Rivas-Fuenmayor. 2008. ''Spiny-tailed Iguanas (Ctenosaura similis) in Venezuela: A Preliminary Report''. Iguana. 15( 3) 160-161.

The black spiny-tailed iguana has been introduced to South Florida and reproduces in the wild in several feral populations. On the southwestern Florida coast, it has been discovered from Collier County north to Tampa Bay.Krysko, K. L. & King, F. W. & Enge, K. M. & Reppas, A. T. (2003): Sarasota county ''Distribution of the introduced black spiny-tailed iguana (''Ctenosaura similis'') on the southwestern coast of Florida''. Florida Scientist, Lawrence, Kansas, USA; 66 (2): 74-79. On the southeastern Florida coast, black spiny-tailed iguanas have been found on Key Biscayne, Hialeah, and in Broward County. As this species will opportunistically feed on small vertebrates, such as fish, rodents, eggs, birds, and even hatchling sea turtles it may pose a threat to endangered native species. These iguanas can thrive in both natural and disturbed areas, making them even more of a threat to native species

Reproduction

Mating generally occurs in the beginning of the dry season. Males court females and show interest with low amplitude head bobbing and flick-licking the female. The female, when receptive, will allow mating with a large male. Females may violently reject forced-copulation attempts. Within eight to ten weeks, females will travel to a communal nesting site. There they, and other females, repeatedly visit nest openings, eventually laying clutches of up to 30 eggs. The eggs hatch in 90 days with the hatchlings digging their way out of the sand. These juveniles are typically green with brown markings, although all brown hatchlings have been recorded as well.
Juveniles become reproductively mature around 2–3 years old.

Commercial usage

In some parts of Central America, the black spiny-tailed iguana, colloquially called the "chicken of the trees," is farmed alongside the green iguana as a food source and for export for the pet trade (see iguana meat). Although it is heavily hunted it does not appear to be endangered in any of its native territory.

Gallery

File:Black Spiny-tailed Iguana-27527.jpg, A basking female on the island of Cozumel in Quintana Roo, Mexico
File:Black Iguana (3326624432).jpg, A male eating a flower in southern Mexico
File:Ctenosaura similis (juvenile).jpg, A juvenile from Rincon de la Vieja, Costa Rica
File:Blue Ctenosaur.jpg, An adult male iguana basking in Santa Rosa National Park, Costa Rica

References

External links

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Black Spinytail Iguana
, Florida Fish & Wildlife Conservation Commission

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similis
Lizards of Central America
Reptiles of Belize
Reptiles of Colombia
Reptiles of Costa Rica
Reptiles of El Salvador
Reptiles of Guatemala
Reptiles of Honduras
Reptiles of Mexico
Reptiles of Nicaragua
Reptiles of Panama
Lizards of the Caribbean
Reptiles described in 1831
Taxa named by John Edward Gray