Tigrosa Georgicola
Tigrosa georgicola is a large, dark, leaf-litter wolf spider of the southeastern United States, named for the state of Georgia where the first specimens were collected. It spins no capture web, hunts on foot across the forest floor after dark, and carries first its egg sac and then its spiderlings with it — a spider that looks formidable and is completely harmless to people.
By Dr. James WatuwaPublished May 18, 2019Updated September 13, 2026✓ Reviewed by Dr Richard J. Pearce (PhD)
In this guide
Physical description and identification
Tigrosa georgicola is one of five North American species placed in the genus Tigrosa, which was separated from Hogna in 2012. It is a large, dark, long-legged wolf spider of the deciduous woodland floor, and its colouring is close enough to damp leaf litter that it is usually noticed only when it moves.
Adults
- Size: adults measure roughly 10–22 mm in body length, or 0.39–0.86 inches. Females are consistently larger and heavier than males, which is the rule throughout the family.
- Color: dark brown to blackish brown overall, with a distinct paler brown or greyish stripe running down the centre of the carapace and lighter, irregular markings on the abdomen, usually including a paler lance-shaped mark over the heart. The legs are dark and faintly banded, and the underside is paler than the back.
- Eyes: eight eyes in three rows — four small ones in a low row across the front of the face, then two very large forward-facing eyes, then two more set wide on top of the head. The four large rear eyes together outline a trapezoid; it is that arrangement that is trapezoid-shaped, not the eyes themselves, which are round. See our guide to spider eyes.
- Distinctive features: a dense covering of fine hairs, robust forward-pointing chelicerae, and long legs built for running rather than climbing. Mature males are slimmer, with longer legs and swollen tips to the pedipalps. Separating T. georgicola from the very similar T. aspersa reliably needs a microscope and adult genitalia.
Eggs and egg sac
The eggs are small, round and white to cream. The female encloses them in a rounded silk sac that she attaches to her spinnerets and tows behind her, so she can go on hunting while guarding the brood. She will sun the sac at the edge of a clearing to speed development, and if the sac is detached she searches for it and tries to reattach it.
Spiderlings
When the young are ready the mother opens the sac and the pale brown spiderlings climb onto the upper surface of her abdomen, gripping specialised hairs. They do not feed while riding, living on their remaining yolk, and after one to two weeks they begin to drop off and disperse across the litter. Each then hunts alone, growing through repeated moults, and most overwinter part-grown before maturing the following year.
Hunting instead of a web
This spider builds no capture web. It hunts as its name suggests a wolf spider should: waiting motionless among leaves until prey comes within range, then closing the distance in a fast rush and pinning the insect with its front legs and fangs. Silk is used only for the dragline, for a loose retreat under bark or a log, and for the egg sac. Most hunting happens after dark, when the reflective layer behind the large eyes makes the most of what little light reaches the forest floor.
Where Tigrosa georgicola lives
The species is restricted to the southeastern United States. Records centre on Georgia, from where the type material came, and extend through Alabama, Mississippi, Tennessee and the Carolinas into northern Florida. It is a regional endemic rather than a continental species, which sets it apart from the widespread wolf spiders people meet in gardens across the country.
Its habitat is the floor of moist deciduous and mixed woodland: deep leaf litter, fallen logs, the banks of shaded streams, and the damp margins where woodland gives way to field. It needs cover it can hide beneath by day and open ground between the leaves to run over at night. Unlike the burrowing wolf spiders of prairie and scrub it digs no shaft, and unlike the grassland species it is rarely found far from tree cover, so it turns up around houses only where woodland comes close to the building.
Are Tigrosa georgicola spiders venomous?
Yes, in the sense that applies to nearly every spider: it carries venom glands and uses them to subdue the insects it catches. The venom is adapted to small arthropods and is not medically significant to humans. No wolf spider anywhere has an antivenom, because none has ever been needed, and there is no record of serious envenoming by this species or any of its close relatives.
The stories that link wolf spider bites to spreading skin ulcers do not survive contact with the evidence. Where bites have been investigated with the spider in hand, the outcome has been ordinary local pain and swelling, with no tissue destruction of the kind caused by a recluse.
Can Tigrosa georgicola spiders bite?
It can, but only defensively, and it has to be provoked into it. The spider's response to a person is to freeze or run. Bites happen when someone picks the spider up, traps it against skin while moving firewood or leaf litter, or puts on a boot it has sheltered in.
A bite feels like a sharp pinch and leaves a small red mark with mild swelling and perhaps some itching. Symptoms stay local and normally fade within a day. Wash the area with soap and water, apply a cold pack, and take a simple painkiller if you need one. Get medical advice if pain is severe or increasing, if redness spreads noticeably over the following day, or if you develop hives, swelling elsewhere or any trouble breathing, since those indicate an allergic reaction rather than the venom. A photograph of the spider makes identification, and reassurance, much quicker.
Not a recluse: Tigrosa georgicola is a hairy, dark, long-legged spider with eight eyes in three rows and one very large forward-facing pair. A brown recluse is much smaller, uniform tan, with six eyes in three pairs, smooth slender legs and a dark violin shape behind the eyes, and it lives in undisturbed indoor clutter rather than in woodland litter.
Ecological importance and behavior of Tigrosa georgicola
Forest-floor wolf spiders are among the most abundant invertebrate predators in temperate woodland, and Tigrosa georgicola is a substantial member of that guild. It takes crickets, beetles, cockroaches, moths, caterpillars, millipedes and other spiders, and by hunting through the leaf layer it removes prey that no web-building spider can reach. Our overview of what spiders eat covers the range.
Natural predators: ground-foraging birds such as thrushes and towhees, along with skinks, toads, shrews and larger arachnids, take adults and juveniles alike. Spider wasps are the specialist threat: a female stings the spider into permanent paralysis and seals it in a nest cell as living food for one larva. Parasitoid flies and wasps also attack carried egg sacs.
Prey-predator dynamics: because leaf litter holds a dense, year-round supply of detritivores and their predators, the spider's numbers track litter depth and moisture more than any single prey species. Woodland that is raked clean or heavily disturbed loses these spiders quickly.
Seasonal behavior: juveniles overwinter in litter and under logs, mature through late spring and summer, and females carry egg sacs through the warmer months. Males wander in search of females at maturity and are the individuals most often seen crossing paths and porches. Adults rarely survive a full second winter.
Relationship with humans: harmless and useful. The species is a woodland animal that does not colonise houses, and the occasional individual found indoors has wandered in by accident. A cup and a piece of card returns it to the leaf litter, where it does more good than any spray.
Similar spiders and how to tell them apart
| Spider | How it differs from Tigrosa georgicola |
|---|---|
| Tigrosa aspersa | The hardest to separate: another large dark Tigrosa of southeastern woodland, and confident identification rests on the adult genitalia rather than on colour or size. |
| Tigrosa helluo | Paler and more olive-brown, often with a yellowish or orange underside, and far more widespread. It prefers wet meadows, marsh edges and field margins rather than forest floor. |
| Carolina wolf spider (Hogna carolinensis) | Bigger and bulkier, mottled grey-brown without a clean pale carapace stripe, with a solid jet-black underside, and it digs a burrow in open, dry ground. |
| Rabid wolf spider (Rabidosa rabida) | Straw yellow with two dark bands on the carapace and one on the abdomen. A spider of tall grass and field edges, not woodland litter. |
| Hogna lenta | Similar size and southeastern range, but more uniformly brown and patterned, without the crisp pale median stripe, and more tolerant of open and sandy habitats. |
Quick facts
| Distribution | Southeastern United States, centred on Georgia and the surrounding states. |
|---|---|
| Habitat | Leaf litter and fallen timber in moist deciduous and mixed woodland, and along shaded stream banks. |
| Web type | None. Silk is used for draglines, a loose retreat and the egg sac. |
| Diet | Crickets, beetles, cockroaches, moths, caterpillars, millipedes and other spiders. |
| Reproduction | White to cream eggs in a sac towed on the spinnerets; spiderlings ride on the mother before dispersing. |
| Predators | Ground-feeding birds, skinks, toads, shrews, spider wasps and parasitoid flies. |
| Genus | Tigrosa was erected in 2012 for five Nearctic species previously placed in Hogna. |
| IUCN status | Not evaluated. |
Did you know?
- The epithet georgicola means “dweller in Georgia”, and the original material behind the name came from Burke County in that state.
- The genus name Tigrosa is a nod to the tiger-like striping of several of its species, and it dates only from 2012 — before that every one of them sat in Hogna.
- Wolf spider eyeshine works in woodland as well as in fields: a head torch picks out the green sparks of Tigrosa eyes among the leaves from several metres away.
- Leaf litter depth is one of the best predictors of how many large wolf spiders a patch of woodland holds, which is a good argument for leaving fallen leaves where they land.
In summary, Tigrosa georgicola is a big, dark, regionally restricted wolf spider that earns its keep as a predator of the forest floor. It has no web, no dangerous venom and no interest in houses — just a pale stripe, a set of remarkable eyes and a habit of hunting in the dark.
Frequently asked questions about the tigrosa georgicola
What does Tigrosa georgicola look like?
It is a large, hairy, dark brown to blackish wolf spider with a distinct pale stripe running down the middle of the carapace and lighter irregular markings on the abdomen. The legs are long, dark and faintly banded, and eight eyes sit in three rows with one very large forward-facing pair.
How big does Tigrosa georgicola get?
Adults range from about 10 to 22 mm in body length, which is 0.39 to 0.86 inches, excluding the legs. Females are consistently larger and heavier than males. With the legs included a mature female is a substantial spider, easily large enough to be alarming at close range.
Is Tigrosa georgicola venomous to humans?
It carries venom for subduing insects, but it is not medically significant to people. No antivenom exists for any wolf spider because none has ever been needed. A bite produces local pain and swelling that fade within a day or so, and it causes none of the tissue damage linked to recluse spiders.
Does Tigrosa georgicola build a web?
No. It catches nothing in silk. The spider waits among leaf litter until prey comes close and then rushes it, pinning the insect with its front legs and fangs. Silk goes into the dragline it trails behind it, a loose retreat under bark or a log, and the egg sac.
What happens if a Tigrosa georgicola bites you?
Expect a sharp pinch, a small red mark and mild swelling that usually settles within a day. Wash the site, apply a cold pack and take a painkiller if needed. Seek medical advice if pain worsens, redness spreads, or you develop hives or breathing difficulty, which suggest an allergic reaction.
Where is Tigrosa georgicola found?
Only in the southeastern United States, centred on Georgia and reaching into Alabama, Mississippi, Tennessee, the Carolinas and northern Florida. Within that area it keeps to the floor of moist deciduous and mixed woodland, among deep leaf litter, fallen logs and the banks of shaded streams.
How does the female look after her eggs?
She wraps the white to cream eggs in a rounded silk sac and fastens it to her spinnerets, so it trails behind her while she continues to hunt. She positions it in sunshine to speed development and will search for and reattach the sac if it is knocked off.
How long do the spiderlings stay with their mother?
The pale brown young leave the sac and climb onto the upper surface of her abdomen, where they grip specialised hairs. They do not feed during this time, living on stored yolk, and after roughly one to two weeks they begin dropping off to hunt independently in the leaf litter.
How is Tigrosa different from Hogna?
Tigrosa was separated from Hogna in 2012 on the basis of genitalic structure, and five Nearctic species were moved into it. In practice Tigrosa species tend to be woodland and wetland-edge hunters with a clean pale carapace stripe, while the large Hogna species of the region dig burrows in open ground.
Why is it called georgicola?
The epithet means dweller in Georgia. The original material behind the species came from Burke County, Georgia, and the name records that origin. The genus name Tigrosa refers to the tiger-like striping of several species in the group, which was erected for them in 2012.
References
- World Spider Catalog (2026). Tigrosa georgicola (Walckenaer, 1837). Natural History Museum Bern. wsc.nmbe.ch/spec-data/27574/taxon
