Giant Invasive Tegu Lizards Spread To The Florida Keys

KEY LARGO, Florida – An invasive species of giant lizard known as tegu have made their way down the Florida Keys.

“If you are traveling near North Key Largo on CR 905 or CR 905A (Card Sound Road), please be on the lookout for Black and White Tegu lizards. The first verified report of these destructive invasive lizards on North Key Largo was recorded on March 4, 2025,” the Florida Keys National Wildlife Refuges Complex posted on Facebook.

“Public assistance in reporting sightings is crucial for slowing their spread and protecting vulnerable species from predation, including the American crocodile and the Key Largo woodrat.”

Tegus reproduce quickly and eat a wide variety of food items, including small animals such as domestic cats, and the eggs of many wildlife species, including alligator, crocodile, sea turtle, and ground-nesting bird eggs.

During winter months, tegus retreat into burrows while they undergo a hibernation-like period known as brumation. In South Florida, they typically begin to emerge from their burrows in February. They lay an average of 35 eggs per year.

Reproducing populations of Argentine black and white tegus are established in Hillsborough County, Miami–Dade County, and Charlotte County, according to the Florida Fish and Wildlife Conservation Commission. An emerging population was also recently discovered in St. Lucie County.

What should I do if I see a tegu?

The Florida Fish and Wildlife Conservation Commission encourages reports of Argentine black and white tegu sightings. You can help by taking a picture, noting the location, and reporting this information using the free IveGot1 mobile app, calling 1-888-Ive-Got1 (888-483-4681), or by reporting online at IveGot1.org.