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  3. Gila Monster
Gila Monster (Heloderma suspectum)

Reptiles · Squamata · Helodermatidae

Gila Monster

Heloderma suspectum

Near Threatened

It could become threatened in the near future if current threats go unchecked.

Spotted something wrong?

It is one of the few venomous lizards in the world, like its relative the Mexican beaded lizard. Its venom has been central to developing drugs for type 2 diabetes.

Weight

350 g – 2.3 kg

Size

15 cm – 56 cm

Life expectancy

25 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Nocturnal

Active mainly at night.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Desert
3countries9parks1same family

AI-generated images: illustrations, not photographs.

Fun facts

  • It is one of only two venomous lizards in the world.
  • It works its venom in by chewing, rather than through hollow fangs as snakes do.
  • Its venom has been central to developing modern drugs for type 2 diabetes.
  • fisiologíaIt is one of the few venomous lizards, and its saliva contains a toxin that inspired a drug now used against type 2 diabetes.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton covered in osteoderms (reptile)
Habitat and environment
Rocky desert and arid scrub of the south-western United States and north-western Mexico
Birth weight
The newly hatched young ~15-16 cm long; no precise weight found
Size at birth
15 - 16 cm long at hatching
Sexual maturity
3-5 years
Gestation / incubation
9-10 months (some sources give up to a full year from fertilisation to emergence)
Litter / clutch size
1 to 12 eggs per clutch
Life expectancy in captivity
Documented record of 28.9 years in captivity

Sources consulted: AnAge (genomics.senescence.info) · Animalia.bio · Animal-pedia.org · AnimalSpot · Elmwood Park Zoo · Nevada Department of Wildlife · Animal Diversity Web · San Diego Zoo

Where to find it

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The pins mark the parks where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Gila Monster — same habitat, park, country, tags or family.

Same taxonomic family
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Keep exploring

Based on what we already know about gila monster.

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See full glossary
This page in other languages: Español · Deutsch · Français · Português · Italiano
See its range on the interactive map→
Grand CanyonUnited States
ZionUnited States
El Pinacate and Gran Desierto de AltarMexico
Joshua TreeUnited States
SaguaroUnited States
Petrified ForestUnited States
Constitución de 1857Mexico
Cumbres de MonterreyMexico
Sierra de San Pedro MártirMexico
Least Concern

Mexican Beaded Lizard

Heloderma horridum

Near Threatened

Mexican Redknee Tarantula

Brachypelma smithi

Least Concern

Great Horned Owl

Bubo virginianus

Least Concern

Western Diamond-backed Rattlesnake

Crotalus atrox

Least Concern

Sonoran Desert Toad

Incilius alvarius

Not Evaluated

Arizona Bark Scorpion

Centruroides sculpturatus

CountriesUnited States
ParksGrand CanyonUnited States
TagsCarnivore
Carnivore
Nocturnal
Solitary
Near Threatened
Reptile
Desert
United States
Mexico
Canada