If you spend enough time around Southwest Florida development sites, you learn quickly that the presence of a gopher tortoise on a parcel is never just about the tortoise. It’s about everything else that comes with it.
The gopher tortoise (Gopherus polyphemus) is one of the most studied and ecologically significant land animals in the southeastern United States — and arguably the single most important keystone species in Florida’s upland ecosystems. Understanding why requires understanding what a keystone species actually is, and what the gopher tortoise’s burrow system means for the hundreds of animals that depend on it.
What Is a Keystone Species?
The term “keystone species” describes an organism whose impact on its ecosystem is disproportionately large relative to its abundance. Remove a keystone species, and the ecosystem it supported doesn’t simply adjust — it collapses or transforms into something fundamentally different. The gopher tortoise earns this designation not because of its predatory role or its position at the top of a food chain, but because of what it builds.
Florida’s current gopher tortoise population is estimated at 700,000–800,000 individuals statewide, according to the Florida Fish & Wildlife Commission (FWC). That number may sound substantial, but it reflects a species in long-term decline — one whose survival is increasingly concentrated in the same landscapes that Southwest Florida developers are most likely to be looking at.
The Gopher Tortoise Burrow: More Than a Hole in the Ground
According to FWC data, a gopher tortoise burrow averages 15 feet long and 6.5 feet deep, though burrows have been documented reaching up to 40 feet long and 10 feet deep. The tortoise constructs this burrow over years, maintaining a stable internal environment year-round: cool in summer, warm during Florida’s mild winters, humid enough to prevent desiccation, and protected from fire.
This is the core of the tortoise’s ecological value. Florida’s upland habitats — the scrub, sandhill communities, and open longleaf pine flatwoods that still exist in patches across Charlotte, Lee, Sarasota, and Collier Counties — are fire-adapted systems. Periodic burns are ecologically necessary, but they’re lethal to animals with nowhere to go. The gopher tortoise’s burrow provides that refuge.
Beyond fire, the burrow functions as a thermal refuge during extreme heat, a protected nursery space, a moisture-stable microhabitat in a landscape that dries out dramatically during Southwest Florida’s dry season (November through May), and a hibernation site for species that need to escape temperature extremes.
The tortoise doesn’t build this burrow for the benefit of other species. It builds it for itself. But what it creates, through no particular altruism, is a resource that over 350 species across the southeastern United States have evolved to exploit.
The Species That Use Gopher Tortoise Burrows in Southwest Florida
The scientific term for an animal that regularly uses another species’ burrow or structure is a commensal — an organism that benefits from the relationship without substantially harming or helping the host. In the case of the gopher tortoise, the list of commensals is extraordinary in both length and ecological significance.
Here are the most notable species documented sharing or using gopher tortoise burrows in Southwest Florida:
Reptiles and Amphibians
- Eastern Indigo Snake (Drymarchon couperi) — Federally threatened. The indigo snake is the most widely recognized gopher tortoise commensal. It shelters in burrows during winter and uses them as a base of operations for hunting. Because the indigo snake has federal protection under the Endangered Species Act, its presence on a site with active tortoise burrows can trigger federal review requirements independent of state-level tortoise permitting.
- Florida Gopher Frog (Lithobates capito) — State species of special concern. The gopher frog is one of the most burrow-dependent commensals: it spends the vast majority of its life underground in tortoise burrows and only emerges briefly to breed in seasonal wetlands. It is found across Charlotte and Sarasota County scrub habitats.
- Eastern Diamondback Rattlesnake (Crotalus adamanteus) — Florida’s largest venomous snake uses tortoise burrows extensively for shelter, ambush, and thermoregulation.
- Florida Pine Snake (Pituophis melanoleucus mugitus) — A large constrictor associated with sandy upland habitats throughout Southwest Florida. Uses tortoise burrows for refuge and sometimes nest sites.
- Coachwhip (Masticophis flagellum) — A fast-moving, diurnal species of open scrub and sandhill. Commonly documented entering and sheltering in active burrows.
- Florida Scrub Lizard (Sceloporus woodi) — A scrub-obligate species of conservation concern. More closely tied to scrub oak habitat than the burrow itself, but frequently observed at burrow entrances using the disturbed sand apron for thermoregulation.
- Six-Lined Racerunner (Aspidoscelis sexlineata) — A fast-moving lizard of open sandy areas; uses burrow aprons and the loose substrate adjacent to entrances.
Mammals
- Florida Mouse (Podomys floridanus) — State-listed as a species of special concern and found almost exclusively in association with gopher tortoise habitat. The Florida mouse is so closely tied to tortoise burrows that it has been proposed as an indicator species for burrow system health. It constructs secondary chambers off the main burrow tunnel.
- Opossum (Didelphis virginiana) — Common opportunistic commensal; uses abandoned or temporarily vacated burrows.
- Armadillo (Dasypus novemcinctus) — Frequently excavates secondary chambers within or adjacent to tortoise burrows. Can cause structural damage to active burrows, making them a management concern on relocation recipient sites.
- Striped Skunk and Eastern Spotted Skunk — Documented users of abandoned or inactive burrow systems.
- Raccoon (Procyon lotor) — Uses burrows for temporary shelter and is a documented predator of tortoise eggs laid near burrow entrances.
- Cotton Mouse (Peromyscus gossypinus) — Upland forest and scrub edge species documented in and around burrow systems.
Birds
- Burrowing Owl (Athene cunicularia) — Though the burrowing owl primarily excavates its own burrows, it is well documented using abandoned or expanded gopher tortoise burrows, particularly in areas where soil conditions are less favorable for independent excavation. Both species are associated with open sandy upland habitats across Charlotte and Lee Counties.
- American Kestrel (Falco sparverius) — The open scrub and sandhill habitat maintained by tortoise activity provides critical foraging ground; kestrels benefit from the open canopy structure that tortoise grazing and activity help maintain.
Invertebrates
The invertebrate commensal community associated with gopher tortoise burrows is both extensive and remarkably specialized:
- Gopher Cricket (Ceuthophilus latens and related species) — A cave cricket that has evolved specifically in association with gopher tortoise burrows. Found in significant numbers within active burrow systems across Southwest Florida’s scrub habitats.
- Gopher Tortoise Commensal Scarab Beetle (Onthophagus polyphemi) — A dung beetle found almost exclusively in association with gopher tortoise burrows. Depends on tortoise feces within the burrow for its life cycle.
- Florida Scrub Scorpion (Centruroides hentzi) — Found in scrub habitats throughout Southwest Florida; documented within burrow systems.
- Various spider species — Including wolf spiders and trapdoor spiders, which take advantage of the stable humidity and temperature of burrow systems.
The documented commensal list exceeds 350 species when all invertebrates are included. The ecological significance of the 60 most important vertebrate species alone makes the gopher tortoise burrow system one of the most critical microhabitats in Florida’s upland ecosystem.
The Ecological Function Beyond the Burrow
The gopher tortoise’s ecological role extends beyond what happens underground. Tortoises are active grazers, consuming a wide variety of grasses, legumes, and low-growing vegetation. This grazing activity creates and maintains the open, patchy ground cover that dozens of scrub-dependent species require. Combined with fire — which the tortoise’s burrow helps animals survive — gopher tortoise activity is one of the key forces that shapes the structure of Southwest Florida’s upland plant communities.
In areas where tortoises have been removed and fire has been suppressed, scrub habitats tend to close in rapidly. Saw palmetto and coastal scrub oak expand, shading out the open sandy areas that scrub lizards, scrub jays, and burrowing owls depend on. The habitat degrades not just for the tortoise, but for the entire commensal community it supports.
Southwest Florida’s Gopher Tortoise Habitat — What Remains
The gopher tortoise is historically associated with fire-maintained longleaf pine/turkey oak sandhills, scrubby flatwoods, and dry prairie habitats. In Southwest Florida, these habitats exist in a mosaic pattern across Charlotte, Sarasota, Lee, and Collier Counties — typically on well-drained sandy soils at slightly higher elevations.
The long-term picture is difficult to look at directly. Gopher tortoise populations have experienced an 80% decline over the last 100 years, according to The Nature Conservancy. The longleaf pine ecosystem that historically defined core tortoise habitat once covered 90 million unbroken acres from Virginia to Florida to Texas. Less than 5% of that original forest cover remains today. A 2021 U.S. Fish and Wildlife Service study projected that without meaningful intervention, approximately 75% of the current gopher tortoise population could be lost by the year 2100.
The challenge in Southwest Florida is that the well-drained, slightly elevated sandy terrain that tortoises require is also among the most developable land in a region where poorly drained flatwoods and wetland-adjacent lots dominate the landscape. The overlap between prime gopher tortoise habitat and prime residential and commercial development parcels is not coincidental — it’s the same soil profile that makes both the tortoise’s burrow and a building’s foundation feasible.
That dynamic plays out locally in real time. Following Hurricane Ian in September 2022, researchers from the Sanibel-Captiva Conservation Foundation documented a 59.2% loss of all active gopher tortoise burrows across their monitored preserves on Sanibel Island — a stark illustration of how quickly a single event can reshape local populations. It also underscores how important connected, intact upland habitat is: isolated populations have no recovery mechanism when a significant disruption hits.
Charlotte and Lee Counties have seen significant conversion of scrubby flatwoods to residential development over the past 30 years, and the fragmentation of remaining habitat has created isolated tortoise subpopulations that lack the connectivity necessary for long-term genetic health. North Port, Lehigh Acres, and the rural eastern portions of both counties retain meaningful tortoise populations, but habitat patches are shrinking and becoming more isolated with each development cycle.
Regulatory Status in Florida
The gopher tortoise was designated a Species of Special Concern in Florida in 1979. It was reclassified as a State-designated Threatened species in 2007, prompting FWC to develop its first formal Gopher Tortoise Management Plan. Today, both the tortoise and its burrow are protected under Florida law, and any project that disturbs, destroys, or relocates gopher tortoises or their burrows requires a valid FWC permit prior to ground disturbance.
The scale of the permitting system reflects how embedded the tortoise is in Florida development activity. In a recent 12-month reporting period, just over 8,000 tortoises were relocated under FWC-issued permits, with 89 permitted recipient sites statewide holding available capacity for more than 23,000 tortoises. FWC has also added perpetual easements on more than 3,300 acres of suitable tortoise habitat in recent years as part of its management plan goals.
Approximately 80% of potential gopher tortoise habitat exists on private or corporate lands — meaning the burden of habitat conservation falls overwhelmingly on landowners and the development community, not on public preserves.
The federal status of the gopher tortoise is an active discussion. The eastern population (Florida and neighboring states) was determined not to warrant federal ESA listing in 2022, a decision that has been formally challenged by conservation organizations citing ongoing population declines and inadequate protections. The species remains under periodic federal review.
For development purposes in Southwest Florida, the practical implication is consistent: if a site has sandy upland soils, scrubby vegetation, or any visible tortoise sign, a survey conducted by an FWC-authorized agent is required before permitting can proceed. Surveys are valid for 90 days from the date of fieldwork per FWC guidelines. If the clock expires before permits are pulled, the survey must be repeated.
What developers who are new to the process often underestimate is the downstream complexity when tortoises are found on-site. A survey finding active burrows triggers the permitting and relocation process — which requires FWC authorization, a qualified agent, and either on-site or off-site relocation depending on available suitable habitat. Each step in that chain has its own timeline, and none of it can be compressed by the project schedule.
Dig Deeper: Do Gopher Tortoises Abandon Their Burrows?
The gopher tortoise’s status as a keystone species is why the regulatory framework around it is what it is. What the regulatory system recognizes — and what the 350+ commensal species make undeniably clear — is that the tortoise and its burrow are not isolated features of a landscape. They are the infrastructure around which a significant portion of Southwest Florida’s upland ecosystem is organized.
Supporting Gopher Tortoise Conservation in Southwest Florida
Creek Engineering is a supporter of the Gopher Tortoise Council, a 501(c)(3) nonprofit organization founded in 1978 by southeastern biologists and concerned citizens committed to reversing the decline of the gopher tortoise and the upland ecosystems it supports. The Council funds graduate student research, supports environmental education programs across the Southeast, and publishes ongoing science through its newsletter The Tortoise Burrow. Notably, the GTC is based in North Port, Florida — one of the Southwest Florida communities where the tension between residential development and tortoise habitat is most direct and most consequential.
If you’d like to support their work, memberships and contributions are tax-deductible: gophertortoisecouncil.org
