How Long Until an Iguana Is Full Grown?

By Lauren Corona

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While 35 extant species of iguanas are currently named, not all of them look as though they're related. These reptiles, belonging to the taxonomic family Iguanidae, vary greatly in size, shape, color and habitat. They can be found in a range of tropical, subtropical and desert habitats all across the world. Galápagos marine iguanas even spend much of their time in the ocean, although they technically live on the coastline.

All Grown Up

As the size and life span of iguana species vary quite wildly, they all take different amounts of time to become fully grown. However, on average, iguanas reach full maturity by 3 years of age. The mature size of iguanas ranges from spiny-tailed iguanas, who can measure as little as 4.9 inches long, to green iguanas, who can reach lengths of up to 7 feet. Depending on the species, these lizards may live for as few as 4 or as many as 60 years.

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