Iguana

The iguana is a type of herbivorous lizard. You can find them in tropical areas of Mexico, Central America, South America, and the Caribbean. The genus was first described by an Austrian naturalist J.N. Laurenti in 1768. There are two main species: the green iguana, which is common and often kept as a pet, and the Lesser Antillean iguana, which lives in the Lesser Antilles.

The name "iguana" comes from the Taino word iwana. Iguanas are popular pets. They have been introduced to many places far from their native homes, such as Ishigaki Island, the Florida Peninsula, Hawaii, Singapore, Thailand, Taiwan, and islands in the Lesser Antilles.

Anatomy and physiology

Iguanas are large lizards that can grow from about 1.2 to 2.0 meters (4 to 6.5 feet) long, including their tails. They have special skin features like a dewlap and scales on their backs and sides. Their scales change in shape and color, helping them hide from danger.

Iguanas have great vision and can see shapes, colors, and movement from far away. They also have a tympanum, or eardrum, which helps them hear. As reptiles, iguanas have a three-chambered heart that helps them move quickly. Their muscles are light because of special fibers that give them strong movements. Iguanas also have a special parietal eye on top of their heads that senses light and helps them know if it is day or night.

Iguanas only eat plants. Their bodies are made to chew and digest leaves and other vegetation. They have strong jaws and special teeth to grip and cut plants. During mating season, males bob their heads and show their dewlap to get the attention of females. After mating, females lay eggs underground, and the babies hatch after about 85 days.

Phylogeny

The green iguana is part of a group of reptiles called iguanians. These reptiles have special glands that can make toxins. Iguanians, like tuataras, use their tongues to catch food. This is different from most other lizards. They mainly use their eyes to find food and wait for it to come close before catching it.

There are two main species of iguanas. The green iguana lives in many places, and there are different kinds or subspecies of it in the Caribbean islands. Some scientists think there might be another special kind of green iguana in Curaçao, but more studies are needed to know for sure.

As food

Iguanas are eaten in some parts of the world. In Mexico, Central America, the Dominican Republic, Puerto Rico, Nicaragua, and Colombia, people eat iguana meat and eggs.

Ecology

Iguanas are important in the places where they live, especially on islands. They eat leaves, flowers, fruits, and seeds. This helps plants grow and spread their seeds. Female iguanas lay many eggs, which give food to animals that eat eggs or baby iguanas. The tunnels that female iguanas dig for their nests make spaces underground that other animals can use. For example, the Lesser Antillean iguana can dig nests as deep as 1.65 m (5.5 ft).