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Atlas / Library / Iguanidae / Green Iguana
AdvancedDiurnal · active nowCITES II
Iguanidae

Green Iguana

Iguana iguanaอิกัวน่าเขียว

Traceable. The figures above appear in the page we cite, which we opened on 10 Aug 2026. That means you can check them, not that we have confirmed they are right. reptifiles.com

Photograph: cello caruso-turiello · CC BY

14:00
Day

Drag the sun. Green Iguana is diurnal, so what it is doing changes with the light. The sheet states a night temperature, and the rail follows it.

Arboreal · warm · humidFrom the sheet: warm end 50°C, 24–31°C, humidity 60–80%

The way of life is written in this sheet, word for word. The climate words summarise the two figures above them, they do not add to them.

CITES II is a global listing and holds in every country. National law is not global, and we hold no national wildlife law for any country, Thailand included. Check your own authority before buying or selling.

Back to the globe My keep

https://keepr.pet/husbandry/en/iguana-iguana

‹ All husbandry guides
warm end50 °C
Humidity60–80 %
Green Iguana (Iguana iguana), photographed in the wild
Photograph · Judy Gallagher · CC BY-SA

Photographed by an observer on iNaturalist and published under a Creative Commons licence; the photographer and the licence are named under the image. It is not an animal of ours, and no animal was handled by us to produce it.

The numbers

Temperature

152025303540 °C
24–31°Ambient
23–28°Night
50°CBasking surfaceMeasured on the surface under the lamp, not in the air. It is not drawn on the rail above: that scale is the air the enclosure holds, and a basking surface sits far outside it.

One ambient band, 24–31°C, dropping to 23–28°C at night. Same scale on every sheet here, so two species compare by eye.

The sheet states24-31 °C / night 23-28 °C / basking surface 50-50 °C

Humidity

60–80%Target RH

The sheet states60-80% day, up to 100% night

UVB

RequiredUVI 3–4

The sheet statesStrong T5 (UVI 3–4); replace ~6 mo

Enclosure
Room-sized, tall (arboreal climbing)

Identity

Adult size

1.75 m150–180 cm
1520100400 cm
150–180 cmNose to tail, adult

The size the sheet states for a grown animal.

Why

Two drawings, because they answer two questions. The silhouette is at true scale against a 1.75 m person: it says how big this animal actually is, which no number does for someone who has never seen one. The bar under it is logarithmic and shared by every sheet here, so a 2 cm isopod and a 4 m python both stay readable on the same axis and two species can be compared at a glance.

Family / Order
Iguanidae / Squamata
Adult size
1.5–1.8 m incl. tail (up to 2 m)
Lifespan (captivity)
15–20 yrs (up to 25)
Activity
Diurnal; arboreal herbivore
Temperament
Large; males territorial in breeding season

How common this animal is

21/100Search interest as a pet

Relative Google search interest for the species as a pet, 2020. The scale is relative within the study: 100 is the most searched reptile it measured, not a count of animals. Reptiles only, and only the species the study measured. An absent value means the study did not measure that species, not that nobody keeps it.

Valdez JW (2021), Using Google Trends to Determine Current, Past, and Future Trends in the Reptile Pet Trade, Animals 11(3):676

3,732,913Live individuals in declared US trade filings

NOT a measure of how many are kept. These filings count animals shipped for any purpose, including the food trade and laboratory supply, and they are United States records only. The three largest volumes in the source belong to a food frog, a bait species and the standard laboratory amphibian.

US Fish and Wildlife Service LEMIS declared wildlife import and export records, as compiled in the received dataset

Enclosure and conditions

Basking
35–49 °C (100–120 °F)
Cool side
27 °C (80 °F)
Night
≥ 21–24 °C
Humidity
60–80% day, up to 100% night
UVB (required)
Strong T5 (UVI 3–4); replace ~6 mo
Min. size
Room-sized, tall (arboreal climbing)
Furnishings
Sturdy branches at basking height
Water
Large + daily misting

What your climate adds

This sheet states a range to hold. Your local climate decides how much work holding it is. Pick the nearest city: nothing is sent anywhere, the choice stays in this browser.

Diet

Diet type
Strict herbivore
Grasses & greens
70% dark leafy greens (collard, dandelion, turnip, mustard)
Avoid
No animal protein; fruit < 10%
Calcium
Supplement + strong UVB critical

Behaviour and handling

HandlingCan tame young; males aggressive in season
DefenseTail whip + claws + bite
CohabitationSolo
ClimbingArboreal: needs height
ChildrenAdult only (large)

Reproduction

Life course

Day 0Hatch
2–3 yrSexual maturity
15–20 yrLifespan in care
90–120 dIncubation
20–40+Clutch
15 yrMinimum commitment
~12 yrReproductive window

Read from the lifespan and maturity the sheet states, for animals in care and not in the wild.

Why

The minimum commitment is the low end of that lifespan, and the reproductive window is what is left after maturity: both are subtractions on stated figures, not figures of their own. The sheet also reports a record of about 25 years; that is a reported maximum, not the range to plan for.

Sexual maturity
~2–3 yrs
Clutch
20–40+ eggs
Incubation
~90–120 days

Common health problems

Metabolic bone disease
Signsvery common; soft/swollen jaw, weak limbs
Preventstrong UVB + calcium + correct diet
Kidney disease
Signsfrom animal protein / dehydration
Preventstrict herbivore diet + hydration
Thermal burns
Signsfrom unguarded heat sources
Preventguard all heat elements
Egg-binding (♀)
Signsstraining, lethargy
Preventlay site; vet if straining

When to see a vet

This is not veterinary advice. If red flags appear (open-mouth breathing, months of weight loss, 'stargazing', persistent regurgitation) consult a qualified exotic (herp) veterinarian. Quarantine new arrivals 30–90 days.

Good to know

  • Grows from a tiny hatchling to 1.5 m+: one of the most abandoned/rehomed reptiles.
  • Has a 'third eye' (parietal eye) on top of the head that senses light.
  • A strict vegetarian giant: never feed it meat or insects.
  • Grows from a tiny hatchling to 1.5 m+ — one of the most abandoned/rehomed reptiles.
  • A strict vegetarian giant — never feed it meat or insects.

Common questions

Does it stay small?

No. 1.5 m+, needs a room-sized space.

Can I feed it meat/insects?

No: strict herbivore; protein harms the kidneys.

Beginner pet?

No: big, long-lived, demanding.

What it needs

A heat sourcebecause temp24-31 °C / night 23-28 °C / basking surface 50-50 °C
A thermostat to regulate itbecause temp24-31 °C / night 23-28 °C / basking surface 50-50 °C
A thermometerbecause temp24-31 °C / night 23-28 °C / basking surface 50-50 °C
A way to check the night figurebecause temp24-31 °C / night 23-28 °C / basking surface 50-50 °C
A hygrometerbecause humidity60–80% day, up to 100% night
UVB (T5), stated as requiredbecause uvbStrong T5 (UVI 3-4); replace ~6 mo
Not stated: The size of the enclosurethis sheet describes the enclosure without a figure: « Room-sized, tall (arboreal climbing) »

Every line above is deduced from a value this sheet states, and names which one. Nothing here is a general recommendation. What the sheet does not state is listed too, rather than left out: a kit that looks complete is worse than one that names its gap.

  • Room-sized tall enclosure
  • Strong T5 UVB (UVI 3–4)
  • High-wattage basking + guard/thermostat
  • Misting system
  • Greens + calcium
  • Large water tub
  • Hygro/thermometer

Sources

Others in this group

What this sheet states

85%
TemperatureHumidityEnclosure sizeActivityOriginDietSourcesUVB

This sheet states 6 of 7 of the fields this product runs on. What is missing turns something off: enclosure size audit. We show the gap rather than fill it with a plausible number.

UVB is measured but does not count: it is absent from 421 of 678 sheets, and on most of them that is not a gap, since a nocturnal snake's sheet has no reason to state a UV index. Counting it would call the library incomplete without cause.