Grand Cayman ground iguana, Grand Cayman blue iguana, Cayman Island rock iguana, Grand cayman ground iguana, Grand cayman blue iguana, Cayman island rock iguana
The Blue iguana (Cyclura lewisi) is an endangered species of lizard. It is found only in the island of Grand Cayman. It 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. 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.
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DiurnalDiurnal animals are active during the daytime, with a period of sleeping or other inactivity at night. The timing of activity by an animal depends ...
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HerbivoreA herbivore is an animal anatomically and physiologically adapted to eating plant material, for example, foliage, for the main component of its die...
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FolivoreIn zoology, a folivore is a herbivore that specializes in eating leaves. Mature leaves contain a high proportion of hard-to-digest cellulose, less ...
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FrugivoreA frugivore is an animal that thrives mostly on raw fruits or succulent fruit-like produce of plants such as roots, shoots, nuts, and seeds. Approx...
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TerrestrialTerrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, snails), as compared with aquatic animals, which liv...
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ZoochoryZoochory animals are those that can disperse plant seeds in several ways. Seeds can be transported on the outside of vertebrate animals (mostly mam...
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Island endemicIsland endemic animals are found in a single defined geographic location, such as an island. Animals or organisms that are indigenous to a place ar...
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TerritorialA territory is a sociographical area that which an animal consistently defends against the conspecific competition (or, occasionally, against anima...
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OviparousOviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
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PrecocialPrecocial species are those in which the young are relatively mature and mobile from the moment of birth or hatching. Precocial species are normall...
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ArborealArboreal locomotion is the locomotion of animals in trees. In habitats in which trees are present, animals have evolved to move in them. Some anima...
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BurrowingA burrow is a hole or tunnel excavated into the ground by an animal to create a space suitable for habitation, temporary refuge, or as a byproduct ...
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SolitaryNo
Not a migrantAnimals that do not make seasonal movements and stay in their native home ranges all year round are called not migrants or residents.
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Blue AnimalsThe Blue iguana has articulated toes that are efficient in digging and climbing trees. The mature male's skin color ranges from dark grey to turquoise blue, whereas the female is more olive green to pale blue. Young animals tend to be uniformly dark brown or green with faint darker banding. Adults change their color to blue when they are in the presence of other iguanas to signal and establish territory. The blue color is more pronounced in males of the species. Males are also larger and have more prominent dorsal crests as well as larger femoral pores on their thighs, which are used to release pheromones.
Blue iguanas can be found throughout the island Grand Cayman excluding the urban areas of Bodden Town, Gun Bay, Seven Mile Beach, and West Bay. They now only occur inland in natural xerophytic shrubland and prefer rocky, sunlit, open areas in dry forests or near the shore. They can also be found along the interfaces between farm clearings, roads, and gardens.
Blue iguanas are solitary creatures and come together only to breed. They are active during the day and sleep at night in rock holes and tree cavities. As adults Blue iguanas are primarily terrestrial although they may climb trees 15 feet (4.6 m) and higher. Younger individuals tend to be more arboreal.
Blue iguanas are herbivorous (folivorous, frugivorous). They consume leaves, flowers, and various fruits. They may very rarely eat insects, crabs, slugs, and fungi.
Blue iguanas breed from May through June. The male courts the female by numerous head-bobs and then he circles around behind the female and grasps the nape of her neck. About 40 days after mating the female excavates a nest in pockets of earth exposed to the sun and lays there a clutch of anywhere from 1 to 21 eggs, usually in June or July. The temperature within nests that have been monitored by researchers remained a constant 32 °C (90 °F) throughout the incubation period which ranges from 65-90 days. The young are aggressively territorial from the age of about 3 months onward. They typically reach reproductive maturity after 4 years of age in captivity.
The Blue iguana was possibly abundant before European colonization, however, by 2003 fewer than 15 animals remained in the wild; this wild population was predicted to become extinct within the first decade of the 21st century. Habitat destruction is the main factor threatening extinction for this iguana. Land clearance within a remnant habitat is occurring for agriculture, road construction, and real estate development and speculation. The conversion of traditional croplands to cattle pasture is eliminating secondary Blue iguana habitat. Predation and injury to hatchlings by rats, to hatchlings and sub-adults by feral cats, and the killing of adults by pet dogs are all placing severe pressure on the remaining wild population. Automobiles and motorscooters are another increasing cause of mortality as the iguanas rarely survive collisions.
According to the IUCN Red List, the total population size of the Blue iguana is 443 mature individuals. Currently, this species is classified as Endangered (EN) on the IUCN Red List but its numbers today are increasing.