Animalia > Chordata > Squamata > Helodermatidae > Heloderma > Heloderma suspectumHeloderma suspectum (Gila Monster)The Gila monster (Heloderma suspectum, /ˈhiːlə/ HEE-lə) is a species of venomous lizard native to the southwestern United States and northwestern Mexican state of Sonora. A heavy, slow-moving lizard, up to 60 cm (2.0 ft) long, the Gila monster is the only venomous lizard native to the United States and one of only two known species of venomous lizards in North America, the other being its close relative, the Mexican beaded lizard (H. horridum). Though the Gila monster is venomous, its sluggish nature means it represents little threat to humans. However, it has earned a fearsome reputation and is sometimes killed despite being protected by state law in Arizona. |
Adult Weight [1] | 1.215 lbs (551 g) | Birth Weight [2] | 45 grams | Female Weight [2] | 1.226 lbs (556 g) |  | Gestation [2] | 8 months | Litter Size [2] | 5 | Litters / Year [2] | 1 | Maximum Longevity [4] | 29 years | Reproductive Mode [3] | Oviparous | Snout to Vent Length [2] | 12 inches (30 cm) | Venomous [5] | Yes |  | Habitat Substrate [3] | Terrestrial |
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Habitat Vegetation Classification |
Name |
Location |
Website |
Chihuahuan Desert Foothill-Piedmont & Lower Montane Grassland |
United States (Texas, Arizona, New Mexico); Mexico (Chihuahua, Coahuila, Sonora) |
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Chihuahuan Piedmont & Foothill Desert Scrub |
Mexico (Nuevo Leon, Coahuila, Chihuahua, San Luis Potosi, Durango, Sonora); United States (New Mexico, Arizona, Texas) |
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Mojave Mid-Elevation Mixed Desert Scrub |
Mexico (Baja California); United States (New Mexico, Utah, Arizona, Nevada, California) |
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Mojave-Sonoran Bajada & Valley Desert Scrub |
Mexico (Sonora); United States (New Mexico, Nevada, Arizona, California) |
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Sonoran Paloverde - Mixed Cacti Desert Scrub |
Mexico (Sinaloa, Sonora); United States (California, Arizona, Nevada) |
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Attributes / relations provided by ♦ 1Length–weight allometries in lizards, S. Meiri, Journal of Zoology 281 (2010) 218–226 ♦ 2Nathan P. Myhrvold, Elita Baldridge, Benjamin Chan, Dhileep Sivam, Daniel L. Freeman, and S. K. Morgan Ernest. 2015. An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96:3109 ♦ 3Meiri, Shai (2019), Data from: Traits of lizards of the world: variation around a successful evolutionary design, Dryad, Dataset, https://doi.org/10.5061/dryad.f6t39kj ♦ 4de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774 ♦ 5Living Hazards Database, Armed Forces Pest Management Board, U.S. Army Garrison - Forest Glen ♦ 6Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database |
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0
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