Guide to Large Spiders and Bites in Virginia

Guide to Large Spider Species Found in Virginia

With its mix of forests, marshes and human dwellings, Virginia is home to an impressive array of spiders. While most of these eight-legged creatures are harmless, the state harbors a few large spider species capable of inflicting painful, and in rare cases dangerous, bites.

Virginia's Venomous Giants

Two types of large spiders found in Virginia can deliver potent, medically significant venom with their bites. The black widow and brown recluse spiders don't aggressive seek out human contact. But trouble arises when people accidentally press up against them or unintentionally invade their webs.

The glossy black Latrodectus mactans, or black widow spider, is found throughout Virginia. Females have a distinctive red hourglass shape on their abdomens and weave messy, strong webs in dark corners of sheds, wood piles and crawl spaces. They deliver painful neurotoxic venom.

The brown recluse spider favors hot, dry, abandoned spaces like attics and old barns. This is a shy species that only bites when trapped against human skin. But its cytotoxic venom can cause tissue damage and severe reactions in some people.

Large Hunters with Mild Venom

Two very large spider dwellers in Virginia that occasionally cross paths with people are the black and yellow garden spider (Argiope aurantia) and the grey cross spider (Araneus diadematus). Despite their intimidating size and appearance, their venom causes only mild symptoms, similar to a bee sting.

The spiny-legged black and yellow garden spider weaves its signature zig-zag golden web in fields and gardens across the state. Females range from 19 to 28 mm (34 1 1/8 inch) in body length. This orb weaver spider preys on all types of insects but is not aggressive toward humans.

The grey cross spider also constructs large, showy orb style webs in Virginia woodlands, yards, barns and warehouses. Adult females measure 19-25 mm (34 - 1 inch) in length. Their name comes from the gray and brown bands that form cross shapes on their bulbous abdomens. They occasionally bite but effects are short-lived.

Spider Bite Symptoms

Many large spiders found in Virginia are unlikely or unable to break human skin. But some may deliver painful and potent bites if accidentally trapped or handled roughly against bare skin.

Black Widow Bites

Around 80% of black widow bites inflict moderate to severe pain and muscle cramping near the bite site. Other symptoms can include:

• Severe abdominal and back pain
• Nausea and vomiting
• Profuse sweating
• Headache
• Hypertension

Effects typically last 24-72 hours and few bites are life threatening. Only the mature female black widow carries enough venom to envenomate humans.

Brown Recluse Bites

Brown recluse bites are rare, but they can cause considerable tissue damage in some cases. Reactions include:

• Sharp pain similar to a bee sting
• Itching and redness
• Blister formation
• Open ulceration
• Black scab formation
• Systemic symptoms like fever and rash (rare)

Seeking prompt medical treatment is crucial with brown recluse bites to prevent extensive skin damage and infection.

Spider Bite Treatment and Prevention

While most spiders in Virginia pose little threat, bite symptoms should never be ignored. Monitoring for growing redness, pain and other concerning reactions is important, as severe spider bites can become serious rapidly.

First Aid

If bitten by a large, concerning spider species in Virginia like a black widow or brown recluse:

1. Clean the bite area with soap and water
2. Apply a cool compress to relieve swelling
3. Elevate the affected limb if possible
4. Monitor for signs of infection
5. Take over-the-counter pain relievers as needed

Medical Care

Seek prompt medical care if you experience:

• Intense pain or swelling
• Ulceration or dead skin
• Muscle spasms or cramping
• High fever, chills or headaches
• Trouble breathing

Antivenom may be used in some cases of severe envenomation. Supportive treatment is the standard approach.

Preventing Spider Bites

To avoid spider bites when cleaning dusty storage areas, woodpiles, rock walls and other prime habitat:

• Cover exposed skin with gloves, long sleeves and pants
• Wear shoes, not sandals, for outdoor work
• Tap and shake debris before grabbing
• Inspect surfaces before placing bare hands

Exercising caution outdoors helps avoid surprise encounters with spiders that could turn painful. Leaving larger spiders residing in barns, dense vegetation areas and other habitats undisturbed also reduces bite risks.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a healthcare professional before starting any new treatment regimen.