The Surprising Diversity of American Geckos

When most people think of geckos, they picture tropical islands or pet store terrariums. But the United States is home to a surprisingly diverse gecko population. According to herpetological surveys, there are approximately 30 gecko species living in the U.S., including 8 native species and over 21 introduced species spread across more than a dozen genera. For anyone interested in herping, geckos offer a rewarding challenge because of their excellent camouflage, nocturnal habits, and remarkable climbing abilities.

With reptile ownership surging 47 percent between 2020 and 2022 and Gen Z now making up 33 percent of all reptile owners, interest in wild geckos has never been higher. The Natural History Museum in Los Angeles even launched a citizen science project called GeckoWatch to track the spread of introduced gecko species across urban environments, highlighting just how widespread these lizards have become.

Native Gecko Species

The United States has relatively few native gecko species, and they are concentrated primarily in the arid Southwest and southern Florida.

Western Banded Gecko

The Western Banded Gecko (Coleonyx variegatus) is arguably the most widespread native gecko in the United States, found across the arid landscapes of Arizona, California, Nevada, New Mexico, and Utah. These small, delicate lizards have translucent skin with brown and cream banding. They are primarily nocturnal and spend their days hiding under rocks, emerging at night to hunt small arthropods.

What makes Western Banded Geckos particularly interesting to herpers is their defensive behavior. When threatened, they will raise their tail and wave it slowly, mimicking the movements of a scorpion to deter predators.

Texas Banded Gecko

The Texas Banded Gecko (Coleonyx brevis) is a close relative of the Western Banded Gecko, but with a more limited range restricted to southeastern New Mexico and western Texas. These small geckos display brown and yellow stripes with black speckling and thrive in arid desert climates. They spend most of their inactive time hiding underneath rocks or debris, becoming active primarily at night in areas with flat rock outcroppings or succulent vegetation.

Florida Reef Gecko

The Florida Reef Gecko (Sphaerodactylus notatus) holds a unique distinction as the only native gecko species in the Eastern United States. Found primarily in the Florida Keys and the southernmost tip of mainland Florida, this tiny gecko measures just 2 to 2.5 inches in total length, making it one of the smallest reptiles in North America.

Introduced Species That Have Taken Hold

Research published in herpetological journals documents at least 18 species of nonnative geckos that have established breeding populations in the United States. While many are concentrated in Florida, others have spread far beyond their initial introduction points.

Mediterranean House Gecko

The Mediterranean House Gecko (Hemidactylus turcicus) is by far the most widespread introduced gecko in the country, with established populations in at least 24 U.S. states. Originally from the eastern Mediterranean region, these adaptable geckos have thrived in urban and suburban environments across the southern and central United States. You will often find them near porch lights at night, hunting moths and other insects attracted to the illumination.

Gold Dust Day Gecko

Gold Dust Day Geckos (Phelsuma laticauda) are among the most beautiful geckos you can encounter in the wild in the U.S. Their bright green or yellowish-green bodies with red speckles on the neck and upper back make them unmistakable. While most common in Hawaii, isolated populations have been documented in parts of California, Texas, and Florida. Unlike most geckos, they are diurnal and feed on insects, fruit, pollen, and nectar.

Indo-Pacific Gecko

The Indo-Pacific Gecko (Hemidactylus garnotii) is notable for being an all-female species that reproduces through parthenogenesis, meaning females produce offspring without mating. This remarkable reproductive strategy has helped the species establish populations across Florida, Hawaii, and parts of the Gulf Coast.

Where and How to Find Wild Geckos

Finding geckos in the wild requires patience, the right timing, and knowledge of their preferred habitats. Most gecko species are nocturnal, so your best bet is to head out after dark with a good flashlight. Urban geckos like the Mediterranean House Gecko are often found near exterior lights on buildings, while native species like the Western Banded Gecko prefer rocky desert terrain.

For those interested in expanding their herping skills beyond geckos, check out our guide to pet geckos to learn how wild observation translates to captive care, or explore our comprehensive overview of herping for lizards to discover other incredible species you can find on your next field outing.

While geckos can be challenging to spot due to their size and stealth, encountering one in the wild is always a treat. Their remarkable adaptations, from sticky toe pads to color-changing abilities, make them one of the most rewarding groups of reptiles for any herping adventure across the United States.