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  3. Common Spiny-tailed Iguana

One of the 9 iguanas on WAnimals

Common Spiny-tailed Iguana (Ctenosaura similis)

Reptiles · Squamata · Iguanidae

Common Spiny-tailed Iguana

Ctenosaura similis

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

The black spiny-tailed iguana or garrobo is a large spiny-tailed lizard, very common in Central America, with dark bands on a grey background. It is the fastest land lizard in the world: runs of more than thirty-five kilometres an hour have been recorded. It has been introduced to Florida, where it ranks among the most troublesome invasive reptiles.

Weight

1 kg – 2.5 kg

Size

60 cm – 1.3 m

Life expectancy

20 years

Diet

Omnivore

Combines animal and plant food depending on availability.

Activity

Diurnal

Active mainly during the day.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Temperate forestDesertOcean
11countries44parks9same family

AI-generated images: illustrations, not photographs.

Fun facts

  • récordIt is documented among the fastest lizards in the world over short distances, topping 30 km/h.
  • It is the fastest land lizard in the world: documented records exceed thirty-five kilometres an hour at a run, a speed no other lizard has matched under controlled conditions.
  • Its tail is covered in rings of spiny scales that it uses as a defensive whip, and a blow from an adult can break the skin.
  • It has become established as an invasive species in southern Florida, where it digs burrows that damage levees and foundations and competes with the native wildlife.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (reptile)
Habitat and environment
Dry forest, thorn scrub, rocky beaches and inhabited areas of Central America
Size at birth
About 6-8 cm of body on hatching
Sexual maturity
3 years
Gestation / incubation
90 days of incubation
Litter / clutch size
30 eggs

Sources consulted: Wikipedia (es): Ctenosaura similis

Where to find it

Best time: All year round in Central America, by day, basking on rocks, walls and ruins; it is especially conspicuous in mid-morning.

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Where to see it

Parks and dive sites where this species has been documented — showing 10 of 44.

Related species

Other species in the catalogue with the most in common with Common Spiny-tailed Iguana — same habitat, park, country, tags or family.

Same taxonomic family
Same taxonomic family
Same taxonomic family
Shares a park
Shares a park
Shares a park

Keep exploring

Based on what we already know about common spiny-tailed iguana.

Share an experience, a fun fact or a tip for seeing the common spiny-tailed iguana.
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The pins mark the parks where its presence is documented.

See its range on the interactive map→
Sian Ka'anMexico
CalakmulMexico
CorcovadoCosta Rica
TortugueroCosta Rica
Manuel AntonioCosta Rica
MonteverdeCosta Rica
Arenal VolcanoCosta Rica
Volcán BarúPanama
CoibaPanama
DarienPanama
See all 44 parks
Green IguanaLeast Concern

Green Iguana

Iguana iguana

Least Concern

Common Desert Iguana

Dipsosaurus dorsalis

Common ChuckwallaLeast Concern

Common Chuckwalla

Sauromalus ater

Least Concern

Mexican Beaded Lizard

Heloderma horridum

Least Concern

Cuban Brown Anole

Anolis sagrei

Least Concern

Giant Ameiva

Ameiva ameiva

CountriesCosta Rica
ParksSian Ka'anMexico
TagsOmnivore
Omnivore
Diurnal
Solitary
Reptile
Temperate forest
Desert
Ocean

North America10

South America1

Costa Rica
Panama
Guatemala
Honduras
Mexico
Nicaragua
Belize
Costa Rica
El Salvador
Guatemala
Honduras
Mexico
Nicaragua
Panama
Turks and Caicos Islands
United States
Colombia