Key Takeaways
- The holes lizards dig in Florida yards are most often created by invasive green iguanas burrowing underground for shelter and nesting.
- Iguana burrows can stretch 3 to 80 feet long and cause serious structural damage to foundations, seawalls, sidewalks, and canal banks.
- Not every hole in your yard comes from an iguana — gopher tortoises, armadillos, and land crabs leave distinctly different signs.
- Fresh iguana burrows are identifiable by loose sandy soil mounds, claw marks at the entrance, and nearby iguana droppings.
- Professional removal is the safest and most effective way to address active iguana burrows before property damage escalates.
If you have noticed mysterious holes lizards seem to have left scattered across your lawn, you are not alone. Thousands of Florida homeowners wake up to find their yards pockmarked with burrow openings that appeared overnight. In most cases, the culprit is the green iguana — a large invasive lizard that digs extensive underground tunnels for nesting, thermoregulation, and escape. These burrows are far more than cosmetic nuisances. Left unchecked, they undermine foundations, erode canal banks, and collapse sidewalks. This guide walks you through exactly what iguana burrows look like, how to tell them apart from other wildlife holes, where in Florida they show up most, and what you can do to protect your property before the damage gets worse.
Why Do Iguanas Dig Holes? Understanding Lizard Burrowing Behavior
Green iguanas are not casual diggers. They excavate burrows with specific purposes tied to survival and reproduction. Understanding why they dig helps you predict where burrows will appear on your property.
Nesting and Egg-Laying
Female iguanas dig nesting burrows between February and June. A single female can lay 20 to 70 eggs per clutch, and she needs a deep, temperature-stable chamber to protect them. Nesting burrows tend to appear in sunny, south-facing areas with loose or sandy soil. The female digs a tunnel, deposits her eggs in an expanded chamber at the end, then covers the entrance. She may guard the area for a few days before moving on.
Thermoregulation and Shelter
Iguanas are cold-blooded reptiles that rely on their environment to regulate body temperature. Underground burrows stay cooler than the surface during Florida's scorching summers and warmer during rare cold snaps. During winter cold fronts, iguanas retreat underground to avoid the freezing temperatures that can immobilize them. A well-established burrow provides reliable shelter year-round.
Escape Routes
Iguanas are prey animals despite their size. Dogs, hawks, and even cars pose threats. Burrows serve as quick-access escape hatches. Iguanas often dig multiple entrance and exit points to give themselves options when a threat approaches. You may notice two or more holes relatively close together — these often connect underground.
What Do Holes Lizards Create Actually Look Like?
Identifying an iguana burrow correctly is the first step toward solving the problem. Iguana burrows have distinctive features that set them apart from other animal holes in your yard.
Entrance Size and Shape
A typical iguana burrow entrance measures 4 to 12 inches in diameter. The opening is roughly oval or D-shaped, wider than it is tall. Juvenile iguanas create smaller holes closer to 3 to 4 inches wide. Adult males — which can exceed five feet in length — produce the largest openings. The entrance is usually clean-cut rather than ragged, reflecting the iguana's powerful claws and deliberate digging style.
Tunnel Depth and Length
Iguana burrows are not shallow scrapes. They can extend 3 to 6 feet deep and run 4 to 80 feet in total length. Complex burrow systems have multiple chambers and branching tunnels. Older, established iguanas tend to create the most elaborate systems. If you see multiple holes within a 10- to 20-foot radius, they likely connect underground.
Soil Mounds and Debris
Fresh iguana burrows produce a distinct fan-shaped mound of excavated soil at the entrance. The soil is loose and often lighter in color than the surrounding ground because it comes from deeper layers. You may also find scattered plant material, small roots, or chunks of limestone near the opening.
Claw Marks and Tracks
Look closely at the burrow entrance and you will often see parallel scratch marks left by the iguana's long, curved claws. Around the entrance, you may spot three-toed footprints in soft soil or sand. These tracks are a reliable confirmation that a lizard — not a mammal — created the hole.
Holes in Yard in Florida: Is It Always an Iguana?
Florida hosts a variety of burrowing wildlife. Not every hole in your yard belongs to an iguana. Correct identification prevents you from taking the wrong action — especially since some burrowing animals are legally protected. Understanding what iguanas eat in Florida yards can also help you recognize the landscaping clues they leave behind near active burrow sites.
Gopher Tortoise Burrows
Gopher tortoises dig burrows that look similar to iguana holes at first glance. However, tortoise burrows have a distinctive half-moon or D-shaped entrance that matches the tortoise's shell profile. They are typically 6 to 10 inches wide and 10 to 15 inches tall. The soil mound in front is called an apron and spreads wide and flat. Gopher tortoises are a protected species in Florida, and disturbing their burrows is illegal without a permit.
Armadillo Digging
Armadillos create shallow, cone-shaped holes 3 to 5 inches deep while foraging for grubs and insects. These are not true burrows but surface excavations. Armadillo digging leaves rough, torn-up patches across the lawn rather than a single clean tunnel entrance. If you see dozens of small, shallow divots, an armadillo is the likely cause.
Land Crab Holes
In coastal areas, land crabs dig perfectly round holes 1 to 3 inches in diameter. These burrows go straight down and often have a small pile of mud pellets around the edge. Land crab holes are much smaller and neater than iguana burrows and typically cluster near mangroves, canals, or tidal zones.
Rat and Snake Holes
Norway rats create burrows with smooth, round openings about 2 to 3 inches wide. Snakes sometimes use abandoned rodent burrows but rarely dig their own. If the hole is under 3 inches wide and you see no claw marks, a rodent is more likely responsible than a lizard.
How Iguana Burrows Damage Your Property
The holes lizards dig may seem harmless on the surface, but underground the damage can be extensive and expensive. Iguana burrows compromise structural integrity in ways that are not immediately visible.
Foundation Undermining
Iguanas frequently dig near buildings because foundations retain heat and the adjacent soil is often looser from construction backfill. Tunnels running alongside or beneath a foundation create voids that cause settling, cracking, and shifting. Repairing foundation damage caused by iguana burrows can cost thousands of dollars.
Seawall and Canal Bank Erosion
South Florida's canal system is particularly vulnerable to iguana burrowing. Iguanas dig into seawalls, levees, and canal banks, weakening the structures that hold back water. During heavy rains or king tides, compromised seawalls can collapse. Multiple municipalities have spent millions addressing iguana-related infrastructure damage along waterways.
Sidewalk and Patio Collapse
Burrows running beneath concrete slabs — patios, driveways, pool decks, and sidewalks — create unsupported voids. Over time, the weight of the concrete causes it to crack and sink into the empty tunnel below. Homeowners sometimes discover the problem only after a section of their patio collapses unexpectedly.
Landscape and Irrigation Damage
The iguana eating habits that destroy landscaping compound the underground threat, as tunneling also severs irrigation lines, displaces root systems, and kills plants by disrupting underground water flow. If you notice sections of your lawn dying in streaks or your irrigation pressure dropping, an underground burrow may have cut through a pipe.
Where in Florida Are Holes From Lizards Most Common?
Iguana populations — and their burrows — are concentrated in specific regions. Knowing whether you live in a high-risk zone helps you stay proactive.
Southeast Florida Hotspots
Miami-Dade, Broward, and Palm Beach counties have the highest iguana densities in the state. Warm year-round temperatures, abundant landscaping, and proximity to canals create ideal habitat. Neighborhoods near the Intracoastal Waterway, C-14 canal, and residential canals throughout Fort Lauderdale and Miami report the highest burrow activity.
The Florida Keys
The Keys offer iguanas a frost-free environment with rocky, easy-to-burrow substrate. Key West, Marathon, and Islamorada have well-established iguana populations. Burrows in the Keys often appear along roadsides, under buildings, and in coastal rock formations.
Southwest Florida's Growing Problem
Lee and Collier counties — including Cape Coral, Fort Myers, and Naples — have seen iguana populations surge over the past decade. Canal-heavy communities in Cape Coral are especially susceptible to burrowing damage. As iguanas expand their range northward and westward, new areas are reporting burrows for the first time.
Central Florida Expansion
While iguanas were historically limited to South Florida, sightings and burrows are now reported as far north as Tampa and Orlando during mild winters. Cold snaps still limit permanent populations, but climate trends suggest the range will continue expanding.
How to Identify Fresh Iguana Burrows Early
Catching burrows early prevents the worst damage. Here are the signs that an iguana has recently started digging on your property.
Fresh Soil Mounds
A newly excavated burrow produces a mound of fresh, loose soil at the entrance. The soil looks distinctly different from the compacted ground around it. After rain, fresh mounds remain fluffy while surrounding soil settles flat. Check your yard weekly during the spring nesting season for new mounds.
Iguana Droppings Nearby
Iguana droppings are dark brown or black with a white urate cap, similar in appearance to bird droppings but larger — often 2 to 4 inches long. Fresh droppings near a burrow entrance confirm active use. Iguanas often defecate near their burrows, in pool areas, and on docks.
Visual Sightings at Dawn and Dusk
Iguanas are most active in the morning when they emerge to bask and in the late afternoon before retreating to shelter. If you see an iguana disappearing into a hole in your yard, you have confirmed its location. Note the spot and check for additional entrances within a 20-foot radius.
Worn Pathways in Vegetation
Iguanas traveling to and from their burrows create visible trails through grass, mulch, or groundcover. These worn paths are 4 to 8 inches wide and lead directly to the burrow entrance. Following the trail can help you locate secondary openings.
What to Do About Holes Lizards Dig in Your Yard
Once you have confirmed iguana burrows on your property, the next step is deciding how to address them. Your approach depends on the severity and location of the damage.
Do Not Simply Fill in the Holes
Your first instinct may be to fill the burrow with dirt or concrete. However, filling an active burrow without removing the iguana first is counterproductive. The iguana will simply dig a new exit, potentially in a worse location — through a wall, under a slab, or into your neighbor's property. Always address the animal before the hole.
Contact a Licensed Wildlife Removal Professional
In Florida, iguanas are classified as invasive and can be legally removed from private property. However, safe and effective removal — especially from burrows — requires experience and proper equipment. Professionals use live traps, snares, and exclusion methods to remove iguanas humanely and in compliance with state regulations. They can also assess the full extent of the burrow system using cameras or probing tools.
Assess and Repair Structural Damage
After the iguana is removed, have a contractor evaluate any structural damage. Burrows near foundations, seawalls, or concrete slabs may require foam injection, soil compaction, or structural reinforcement. Addressing the voids left behind prevents future settling and collapse.
Exclusion and Habitat Modification
Once the immediate problem is resolved, take steps to make your property less attractive to iguanas. Remove fruit-bearing trees and flowering plants that iguanas favor. Trim tree branches that hang over fences or rooflines. Install hardware cloth or metal mesh barriers around the base of seawalls, sheds, and decks to block future burrowing.
Preventing Future Iguana Burrows on Your Property
Prevention is more cost-effective than repeated removal. A multi-layered approach keeps iguanas from establishing new burrows.
Landscaping Changes
Iguanas are drawn to properties with abundant food sources. Homeowners curious about whether iguanas eat meat or insects are often surprised to learn that their diet is almost entirely plant-based, which means replacing hibiscus, bougainvillea, orchids, and fruit trees with plants iguanas avoid — such as citrus, milkweed, or oleander — removes key food incentives and reduces the likelihood that iguanas will stay long enough to dig.
Physical Barriers
Wire mesh buried 12 to 18 inches underground along fences, seawalls, and building perimeters prevents iguanas from burrowing in high-risk areas. Use galvanized or stainless steel mesh with openings no larger than one inch. Secure the mesh tightly so iguanas cannot push underneath.
Reducing Shelter Opportunities
Clear dense groundcover, rock piles, and debris that provide hiding spots. Iguanas prefer properties where they can move between food, basking sites, and shelter without crossing open ground. Eliminating cover makes your yard less appealing.
Regular Property Inspections
Walk your property at least once a week during the warmer months. Look for fresh soil mounds, claw marks, droppings, and worn trails. Early detection allows you to act before a small exploratory hole becomes an 80-foot tunnel system. Pay special attention to areas near water, south-facing slopes, and the edges of concrete structures.
Professional Monitoring Programs
Some wildlife management companies offer ongoing monitoring and maintenance plans. These programs include scheduled inspections, trap placement, and exclusion maintenance. For properties in high-density iguana zones, regular professional oversight provides peace of mind and catches problems before they escalate.
Frequently Asked Questions
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How deep do iguana burrows go?
Iguana burrows typically extend 3 to 6 feet below the surface. The depth depends on soil type, the iguana's size, and the purpose of the burrow. Nesting burrows tend to be deeper than shelter tunnels because eggs require stable temperatures. In sandy South Florida soil, iguanas can dig to these depths relatively quickly.
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Can iguana burrows cause my house to sink or crack?
Yes. Burrows running alongside or beneath your foundation create voids that lead to settling and cracking over time. The risk increases with the number and size of tunnels. If you notice new cracks in your foundation, interior walls, or driveway, have both a pest professional and a structural engineer evaluate the situation.
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Is it legal to fill in iguana burrows in Florida?
You can fill in iguana burrows on your own property. However, you must first confirm the burrow belongs to an iguana and not a protected species like the gopher tortoise. Filling a gopher tortoise burrow without a permit is a state and federal violation. If you are unsure which animal created the hole, consult a wildlife professional before taking action.
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How do I tell the difference between iguana holes and gopher tortoise burrows?
Gopher tortoise burrows have a distinctive half-moon shape matching the tortoise's domed shell. The soil apron in front is wide and flat. Iguana burrows are more oval, show claw marks, and often have iguana droppings nearby. Gopher tortoises are also found in drier, sandy upland areas, while iguanas prefer locations near water and dense vegetation.
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How many iguanas can live in one burrow system?
A single burrow system may house one to several iguanas. Females sometimes share nesting areas, and juveniles may occupy abandoned tunnels. Male iguanas are territorial and typically maintain their own burrow, but in areas with high population density, multiple iguanas can live in a connected tunnel network spanning dozens of feet.
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When is the best time to address iguana burrows?
The best time to act is as soon as you notice a new burrow. However, if you are planning a broader removal effort, late winter to early spring — before nesting season begins in earnest — is ideal. Removing iguanas before they lay eggs prevents the next generation from hatching on your property. During peak nesting season from March through June, burrow activity increases significantly.