The green iguana (Iguana iguana ), also known as the American iguana or the common green iguana, is a large, arboreal, mostly herbivorous species of lizard of the genus Iguana. Usually, this animal is simply called the iguana. The green iguana ranges over a large geographic area; it is native from southern Brazil and Paraguay as far north as Mexico, and has been introduced from South America to Puerto Rico and is very common throughout the island, where it is colloquially known as gallina de palo ("bamboo chicken" or "chicken of the tree") and considered an invasive species; in the United States, feral populations also exist in South Florida (including the Florida Keys), Hawaii, the U.S. Virgin Islands and the Rio Grande Valley of Texas. Green iguanas have also successfully colonised the island of Anguilla, arriving on the island in 1995 after rafting across the Caribbean from Guadeloupe, where they were introduced.
A herbivore, it has adapted significantly with regard to locomotion and osmoregulation as a result of its diet. It grows to 1.5 m (4.9 ft) in length from head to tail, although a few specimens have grown more than 2 m (6.6 ft) with bodyweights upward of 20 lb (9.1 kg).
Commonly found in captivity as a pet due to its calm disposition and bright colors, it can be very demanding to care for properly. Space requirements and the need for special lighting and heat can prove challenging to the hobbyist.
Green iguanas are large beautiful looking lizards found in the Americas. Despite their name, Green iguanas can come in different colors and types. Their color may range from green to lavender, red, orange, black, and even reddish brown. They can also be bluish in color with bold blue markings. Green iguanas have a row of spines along their backs and along their tails, which helps to protect them from predators. Their whip-like tails can be used to deliver painful strikes and like many other lizards, when grabbed by the tail, the iguana can allow it to break, so it can escape and eventually regenerate a new one. In addition, iguanas have a well-developed dewlap, which helps regulate their body temperature. This dewlap is used in courtships and territorial displays.
The native range of Green iguanas extends from southern Mexico to central Brazil, Dominican Republic, Paraguay, and Bolivia and the Caribbean; specifically Grenada, Aruba, Curaçao, Trinidad, and Tobago, St. Lucia, St. Vincent, and Útila. They have been introduced to Grand Cayman, Puerto Rico, Texas, Florida, Hawaii, and the U.S. Virgin Islands. These lizards inhabit tropical rain forests and are often found near water. They also can be found in other types of habitat including dry forest, gallery forest, and mangroves.
Green iguanas are diurnal, arboreal lizards. They are very agile climbers, and if the lizards fall up to 50 feet (15 m) they can land unhurt (iguanas use their hind leg claws to clasp leaves and branches to break a fall). During cold, wet weather, Green iguanas prefer to stay on the ground for greater warmth. These solitary lizards usually live near water and are excellent swimmers. When swimming, an iguana remains submerged, letting its four legs hang limply against its side. They propel through the water with powerful tail strokes. When iguanas sense danger, they will usually freeze or hide.
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