Native to Central and South America, including countries like Brazil, Venezuela, Colombia, and extending into parts of the Caribbean, the giant ameiva is known for its bold appearance, high energy, and fearless behavior. True to its name, this lizard can grow up to 18–20 inches (45–50 cm) in length, with over half of that length made up by its long, muscular tail.
What makes the giant ameiva especially striking is its vivid coloration. Adults typically have emerald green or turquoise flanks, a brown or olive back with light speckling or striping, and blue or teal hues on the tail and sides, especially in males. Their scales are smooth and shiny, giving them a metallic or iridescent sheen in the sunlight. Juveniles are often more subdued in color, with brownish tones and faint stripes that become brighter as they age. This brilliant coloring, combined with their size and confident movements, makes the giant ameiva hard to miss when it’s out and about.
Unlike many lizards that rely on camouflage and stillness, the giant ameiva is constantly on the move, foraging actively during the day. It uses its excellent vision and quick reflexes to search for a wide range of food, including insects, spiders, small amphibians, fruits, and even carrion. When threatened, it relies on its incredible speed and ability to dash into dense vegetation or burrow under debris.
Socially, giant ameivas are territorial and solitary, especially males, who often patrol and defend their space with aggressive displays like head bobbing, tail flicking, or even chasing rivals. They can be bold around humans and are often seen basking on warm surfaces like rocks, logs, or sidewalks in tropical areas. Despite their confidence, they’re alert and quick to flee if approached too closely.
Distribution
Argentina
Bolivia
Brazil
Colombia
Costa Rica
Ecuador
French Guiana
Guyana
Honduras
Nicaragua
Panama
Paraguay
Peru
Suriname
Trinidad & Tobago
United States
United States
VenezuelaAnything we've missed?
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Terrestrial / Aquatic
Altricial / Precocial
Polygamous / Monogamous
Dimorphic (size) / Monomorphic
Active: Diurnal / Nocturnal
Social behavior: Solitary / Pack / Herd
Diet: Carnivore / Herbivore / Omnivore / Piscivorous / Insectivore
Migratory: Yes / No
Domesticated: Yes / No
Dangerous: Yes / No
