Lizards & Frogs in Central Florida: Your Backyard Pest Control Team

If you live in Central Florida, you've seen them — little brown lizards darting across the patio, tree frogs clinging to the porch light, and maybe a toad or two after a summer rain. Most people either ignore them or try to shoo them away. But here's the thing: these critters are some of the best pest control you'll ever have, and they work for free.

That said, not all of them are friends. A few are invasive, aggressive, or genuinely dangerous to pets and people. Here's your guide to who's who in the Central Florida lizard and frog world this summer.

The Good Guys: Harmless & Helpful

Green Anole (Anolis carolinensis)

Florida's only native anole, and a true garden ally. These bright green lizards (they can turn brown, too) spend their days hunting insects in shrubs and trees. They eat beetles, flies, spiders, roaches, and yes — mosquitoes.

Harmless? Completely. They're small, non-venomous, and rarely bite. If handled roughly they might give a tiny nip, but it's nothing.

Where you'll find them: Higher up in bushes and trees. They've been pushed upward by the more aggressive brown anole, so look for them on branches and fence tops.

Brown Anole (Anolis sagrei)

The little brown lizard you see everywhere — on sidewalks, patios, and walls. They're actually invasive (from Cuba), but they've been in Florida for over a century and they're here to stay. And honestly? They're doing us a favor.

Why they're helpful: Brown anoles are voracious insect eaters. They hunt on the ground and low on tree trunks, snatching up ants, roaches, spiders, and mosquitoes. UF research has shown that brown anoles may actually help humans by "absorbing" mosquito bites — they're a preferred host for mosquitoes, which means fewer bites on you and less disease transmission.

Harmless? Yes. They don't carry diseases that affect humans, and they're not venomous. They may bite if grabbed, but it's barely noticeable.

Five-Lined Skink (Plestiodon fasciatus)

You've probably seen these — sleek, shiny lizards with bright blue tails as juveniles. They're fast, they're common, and they're excellent pest control.

What they eat: Crickets, grasshoppers, beetles, spiders, and caterpillars.

Harmless? Yes. There's an old myth that skinks have a venomous sting (some people call them "scorpions"), but it's completely false. They have strong jaws and can bite if cornered, but they're harmless to people.

House Geckos (Hemidactylus spp.)

Those little translucent geckos you see clinging to walls near porch lights at night? They're eating machines. Geckos are nocturnal, and they position themselves near lights where insects gather. One gecko can eat dozens of mosquitoes, moths, and flies in a single night.

Harmless? Yes. They don't bite, they're not venomous, and they're actually shy around people.

Native Frogs (Green Treefrog, Squirrel Treefrog, Southern Leopard Frog)

Most of Florida's native frogs are harmless and incredibly beneficial. A single frog can eat hundreds of insects per night — mosquitoes, flies, moths, and beetles. If you have a pond or a damp area in your yard, frogs are your best natural mosquito control.

Harmless? Yes. Native frogs are reclusive and pose no threat to people or pets. They don't secrete dangerous toxins, and they're generally shy.

The Bad Guys: Invasive & Dangerous

Cane Toad (Rhinella marina) — Also called Bufo Toad

This is the one you really need to know about. Cane toads are large (up to 6+ inches), warty, and have distinctive triangular glands behind their eyes. They secrete a milky-white toxin called bufotoxin that can kill a dog in as little as 15 minutes.

Why they're dangerous:

• The toxin is rapidly absorbed through the mouth and gums

• Symptoms in pets: frantic behavior, brick-red gums, foaming at the mouth, seizures

• Can be fatal without immediate treatment

• The toxin also irritates human skin and eyes — wear gloves if you need to remove one

How to identify them: Look for large, warty toads with no ridges on their head (native southern toads have two prominent ridges). They're most active after rain at night.

What to do: If you see one, the FWC says they can be humanely killed on private property year-round with landowner permission. Do not relocate them. If your pet gets one, immediately rinse their mouth with water (spraying from back to front, not down the throat) and get to a vet.

Cuban Treefrog (Osteopilus septentrionalis)

This invasive frog is spreading fast across Central Florida. They're large (up to 2–5 inches), warty, and have huge bug eyes. They're often found around houses — behind shutters, in potted plants, and on walls near lights.

Why they're a problem:

• They secrete a sticky toxin that burns eyes and skin

• The secretion can cause excessive salivation and even seizures in pets that bite them

• They carry rat lungworm, a parasite that can be dangerous if ingested by pets or humans

• They eat native treefrogs and outcompete them for food and habitat

Harmless? No. They're not lethal to humans, but their toxin is extremely irritating. They should not be handled without gloves, and they make terrible pets.

Argentine Black and White Tegu (Salvator merianae)

These are making headlines in Central Florida right now. Tegus are large lizards (up to 5 feet long) that look like mini dinosaurs. They've been spotted in Brevard County and other parts of Central Florida this summer.

Why they're dangerous:

• They eat the eggs of native wildlife, including alligators and sea turtles

• They're strong swimmers and can travel long distances

• They have powerful jaws and a strong bite

• They can be aggressive when cornered

Harmless? No. Do not approach or try to capture one. If you see a tegu, take a photo, note the location, and report it through the IveGot1 app or the FWC Exotic Species Hotline.

Nile Monitor (Varanus niloticus)

The USGS calls this the "largest, most dangerous invasive lizard in the United States." Nile monitors can grow over 6 feet long and have been found in Lee, Palm Beach, and even Volusia counties. They eat just about anything — birds, eggs, small mammals, turtles, and other reptiles.

Harmless? Absolutely not. They have sharp teeth, powerful claws, and can be aggressive. Report sightings immediately.

How to Encourage the Good Guys (and Discourage the Bad)

For helpful lizards and frogs:

• Leave some leaf litter and low shrubs for cover

• Keep a shallow water dish (frogs need moisture)

• Don't use broad-spectrum insecticides that kill their food supply

• Plant native shrubs and trees — green anoles especially need vertical habitat

For the dangerous ones:

• Remove standing water and debris piles where cane toads and Cuban treefrogs hide

• Seal gaps around doors, windows, and utility lines

• Turn off outdoor lights when not needed (they attract insects, which attract frogs)

• If you find a cane toad or Cuban treefrog, humanely euthanize (FWC recommends applying benzocaine cream to the belly, then freezing overnight)