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Iguanas are often hard to spot, as they tend to blend into their surroundings, and their coloration enables them to hide from larger predators. [13] Like most reptiles, an iguana has a three-chambered heart with two atria, one ventricle, and two aortae with a systemic circulation. [14]
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.
Brachylophus species are the most geographically isolated iguanas in the world. Their closest extant relatives (the genera Amblyrhynchus, Conolophus, Ctenosaura, Cyclura, Iguana and Sauromalus [2]) are present in primarily tropical regions of the Americas and islands in the Galápagos and Lesser and Greater Antilles.
Marine Iguanas are the only marine lizard species in the world found only in the Galápagos Islands. They can dive as deep as 30m (98 feet) and hold their breath for 30-40 minutes.
The marine iguana (Amblyrhynchus cristatus), also known as the sea iguana, saltwater iguana, or Galápagos marine iguana, is a species of iguana found only on the Galápagos Islands . Unique among modern lizards , it is a marine reptile that has the ability to forage in the sea for algae , which makes up almost all of its diet. [ 3 ]
Green iguanas in captivity are known carriers of E. coli and salmonella bacteria.
There are a few reasons as to why the black-chested spiny-tailed iguana is endangered, but the most significant reason is human activity. [3] Threats from humans include from hunting, trading, and habitat destruction and fragmentation. [3] [6] The forests in which the iguanas live are being cleared, mainly for agricultural purposes. [3]
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