A venomous lizard native to the southwestern US and Mexico.
- Heloderma suspectum, family Helodermatidae
- Moreover, like many snakes - but unlike any other lizards - Gila monsters and beaded lizards are venomous.
- At rest, Gila monsters and beaded lizards have among the lowest metabolic rates ever measured in lizards - far lower than the rates in monitor lizards.
- The only poisonous lizards are the Gila monster and the beaded lizard, both of which live in the desserts of Mexico and Arizona.
Late 19th century: named after Gila, a river in New Mexico and Arizona.
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