How long do iguanas live?

Iguanas typically live 12 to 20 years with proper care. Some well cared for individuals can live over 20 years. Lifespan depends on diet, housing, temperature control, and overall health management. Wild iguanas face predators and environmental challenges that often shorten their lives compared to captive iguanas.

How big do iguanas get?

Green iguanas grow 5 to 7 feet long from head to tail, with tails comprising half to two thirds of their length. Adults typically weigh 11 to 20 pounds. Males grow larger than females. Size varies by species, with some iguanas staying smaller than 2 feet long.

Yes, iguanas are excellent swimmers. They use their powerful tails to propel through water. Wild iguanas often live near water and dive in to escape predators. They can hold their breath for extended periods. Marine iguanas dive up to 30 feet to forage for algae on the ocean floor.

Do iguanas make good pets?

Iguanas can be rewarding pets for experienced reptile keepers but are not suitable for beginners. They require large enclosures, specific diets, UV lighting, temperature control, and can live over 20 years. Adult iguanas may become aggressive during breeding season. Proper care requires significant time, space, and financial commitment.

Are iguanas dangerous?

Iguanas are generally not dangerous but can defend themselves. They have sharp claws, strong tails, and can bite. Large iguanas may inflict serious injuries if threatened or during breeding season when males become territorial. Proper handling techniques and respecting their space minimize risks. Wild iguanas usually flee rather than fight.

What is the dewlap on an iguana?

The dewlap is a large flap of skin that hangs beneath an iguana's chin. Males extend their dewlaps to attract females, establish territory, and communicate with other iguanas. A larger, more colorful dewlap often indicates a healthier, more dominant male. Both sexes have dewlaps but males have larger ones.

Can iguanas change color?

Yes, iguanas can change color based on temperature, mood, health, and age. They may darken to absorb more heat or lighten when warm. Males develop bright orange coloring during breeding season. Stress, illness, or shedding can also affect coloration. Color changes are less dramatic than chameleons but still noticeable.

Iguana Facts: Species, Diet, Habitat, Care & More

Everything about these large tropical lizards

Iguanas are large herbivorous lizards found in tropical regions. Learn about iguana species, diet, behavior, habitat, and popular pet care.

Key Facts

Scientific Name

Iguana iguana (Green Iguana)

Lifespan

12 to 20 years

Length

5 to 7 feet (1.5 to 2.1 m)

Weight

11 to 20 lbs (5 to 9 kg)

Species

35+ iguana species

Diet

Herbivore (leaves, flowers, fruit)

Habitat

Tropical rainforests and coasts

Tail Length

Half to two thirds of body

Swimming Ability

Excellent swimmers

Speed

Up to 21 mph on land

Third Eye

Parietal eye on head

Dewlap

Throat flap for communication

Quick Stats

Attribute	Value
Scientific Name	Iguana iguana
Average Lifespan	12 to 20 years
Length	5 to 7 feet
Weight Range	11 to 20 lbs
Number of Species	35+
Diet Type	Herbivore
Top Speed	21 mph
Habitat	Tropical regions
Sexual Maturity	3 to 4 years

About Iguana Facts: Species, Diet, Habitat, Care & More

Iguanas are large lizards native to tropical regions of Central America, South America, and the Caribbean. The green iguana is the most recognized species and one of the most popular pet reptiles.

Physical Characteristics and Appearance

Green iguanas are the largest species, reaching 5 to 7 feet in length from head to tail. Their tails account for approximately half to two thirds of their total length. Adult iguanas typically weigh 11 to 20 pounds, though some males grow larger. One of the iguana's most fascinating features is a third eye on top of the head called the parietal eye.

Diet and Feeding Behavior

Iguanas are strict herbivores that eat leaves, flowers, and fruit. In the wild, they consume a wide variety of plants including hibiscus, dandelions, and other vegetation. Fruit should comprise only 10 to 20 percent of their diet. Iguanas need exposure to UV light to produce vitamin D3, which helps absorb calcium.

Habitat and Distribution

Green iguanas inhabit tropical rainforests, coastal areas, and mangrove swamps from Mexico to Brazil. They prefer areas near water sources. Iguanas are excellent climbers and spend most of their time in trees. When threatened, they drop from branches into water below, sometimes falling from heights over 40 feet.

Behavior and Communication

Iguanas are primarily solitary animals except during breeding season. Males are territorial and defend their areas from other males. They use head bobbing, dewlap extension, and color changes to communicate. Rapid head bobbing signals aggression or dominance.

Reproduction and Life Cycle

Iguanas reach sexual maturity at 3 to 4 years old. A female can lay 20 to 70 eggs depending on her size and health. Eggs incubate for 90 to 120 days. Young iguanas often stay together in groups for protection during their first year.

Species Diversity

Over 35 species of iguanas exist, adapted to different environments. It dives up to 30 feet to eat algae. The spiny tailed iguana is one of the fastest lizards, reaching speeds of 21 mph. The blue iguana of Grand Cayman is critically endangered with only about 1,000 individuals remaining in the wild.

Conservation and Pet Trade

Many iguana species face threats from habitat loss and hunting. Some cultures eat iguana meat and eggs. The pet trade has significantly impacted wild populations. Green iguanas are bred in captivity for the pet market, reducing pressure on wild populations.

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Did You Know?

•

Iguanas have a third eye on top of their head called the parietal eye that detects predators from above

•

Green iguanas can drop from heights over 40 feet into water to escape predators without injury

•

An iguana's tail makes up half to two thirds of its total body length

•

Marine iguanas are the only lizards that forage for food in the ocean

•

Iguanas can hold their breath underwater for up to 30 minutes

•

The fastest iguana species can run up to 21 mph to escape danger

Frequently Asked Questions

Iguanas are strict herbivores that eat leaves, flowers, and fruit. Wild iguanas consume various plants including hibiscus and dandelions. Pet iguanas need leafy greens like collard greens and mustard greens. Fruit should comprise only 10 to 20 percent of their diet. Proper nutrition and UV light are essential for calcium absorption.