White tail spider bite: symptoms, risk and what to do in Perth

What is a white tail spider?

A white tail spider (Lampona cylindrata or Lampona murina) is a medium-sized brown hunting spider found across eastern and southern Australia, including Perth. It reaches about 15-18 mm in body length, with a velvety brown to grey-brown body, eight long legs, and a distinctive white or pale tip on the tip of the abdomen (hence the name). They're nocturnal hunters that prowl walls and ceilings at night in search of other spiders, so they're actually beneficial predators around a home.

You'll rarely see one during the day. They're most active from autumn through spring and are particularly noticeable inside homes as temperatures cool and indoor hunting becomes worthwhile. They're not aggressive, but they are defensive: if accidentally trapped or pressed against skin (say, inside a sleeping bag or under a pillow), they will bite.

White tail spider bite symptoms: what actually happens

A white tail spider bite is generally mild. The fangs are small and the venom load is low. Most reported bites produce:

• Immediate sharp pain or sting, similar to a mosquito bite or wasp sting.
• Redness and mild swelling around the bite site within minutes.
• Itching that can persist for several hours to a few days.
• Possible bruising if the bite occurs on thin skin or over a joint.

Systemic effects (fever, nausea, vomiting) are exceptionally rare in Australian medical literature. Most bites resolve completely within 24 hours. The pain is usually less intense than a wasp sting and comparable to a bee sting, though individual pain thresholds vary.

Are white tail spiders dangerous?

No. White tail spiders are not considered a serious threat to human health in Australia. The Australian Museum and Poisons Centre data confirm they are low-risk spiders. Their venom is designed to subdue other spiders, not mammals, and the quantity delivered in a bite is minimal.

The confusion arises from historical media coverage in the 1990s and 2000s that linked white tail bites to necrotic skin lesions. This claim was investigated and largely debunked by the University of Sydney: controlled tests showed white tail spider venom does not cause necrotic lesions in the way some redback or funnel-web bites can. The lesions that sometimes did follow white tail bites were typically the result of secondary bacterial infection from scratching, or they were unrelated skin conditions coincidentally occurring near the bite.

The bottom line: a white tail bite is a nuisance, rarely a medical emergency. It's far less concerning than a wasp sting and infinitely less serious than a redback or Sydney funnel-web.

Can a white tail spider kill you?

No. There are no recorded deaths from white tail spider bites in Australia. No Australian death has ever been attributed to white tail venom. The venom is simply too weak to cause systemic harm in a human. If you've been bitten and you're in pain, that pain is real and valid, but the risk of severe medical consequences is as close to zero as makes no difference.

What does a white tail spider bite look like?

A white tail spider bite usually shows:

• Two small puncture marks close together, the fangs only a millimetre or two apart.
• A red or purplish halo around the puncture site, extending 1-2 cm from the bite.
• Mild to moderate swelling in the immediate area, sometimes including the surrounding tissue (e.g., if bitten on the hand, the hand may swell slightly).
• Warmth to the touch at the site, which subsides as the inflammation fades.

The bite itself is often not visible at the time of the bite: you'll feel the pain or notice the swelling, then look and find the puncture marks. Unlike some insect bites, there's usually no blister or raised bump, just redness and possibly a small bruise.

First aid for a white tail spider bite

1. Clean the area gently with soap and water to reduce the risk of secondary infection.
2. Apply a cold compress or ice pack for 10-15 minutes to reduce swelling and numb the immediate pain. Wrap ice in a cloth; don't apply it directly to skin.
3. Take paracetamol or ibuprofen for pain, following the package directions.
4. Don't scratch, even though it itches. Scratching introduces bacteria and can turn a minor bite into an infection risk.
5. Elevate the bitten area if possible (e.g., if bitten on the hand, rest it on a cushion) to reduce swelling.

Most bites resolve within 24 hours without any additional intervention. If swelling spreads beyond the immediate area, or if systemic symptoms appear (fever, persistent nausea), contact your GP or call 13 HEALTH for advice.

When to see a doctor after a white tail bite

Seek medical attention if:

• Swelling or redness is spreading rapidly (e.g., to the entire limb) more than a few hours after the bite.
• You experience fever, chills, or systemic symptoms.
• The bite shows signs of severe secondary infection (pus, significant warmth, or an expanding area of redness beyond a normal inflammatory response).
• You have severe allergic reactions (shortness of breath, facial swelling, anaphylaxis) - extremely rare but theoretically possible in individuals with insect-venom allergies.
• You're unsure whether it's actually a white tail bite, or the bite is on your face or neck and swelling is significant.

For Perth residents, call your GP or the Poisons Centre on 13 1126 (available 24 hours). They can advise whether a visit to a medical centre or hospital is necessary. In almost all cases, it won't be.

How to get rid of white tail spiders in your home

Because white tails are beneficial predators and bites are so rare, the goal isn't pest management in the traditional sense, it's reducing the likelihood of a defensive bite. Here's how:

Habitat removal

• Remove clutter. White tails hide in dark, warm places: piles of clothes, stacked boxes, old newspapers, or cluttered cupboards. Clear these out and store items in sealed containers.
• Seal gaps and crevices in window frames, door seals, and wall cavities where they might hide during the day.
• Reduce the other spiders they feed on. If your home has a lot of common household spiders (like huntsmen or daddy longlegs), reducing clutter and sealing wall cracks will reduce the prey base and, with it, the white tail population.

Personal habits

• Shake out clothing and bedding before putting them on, especially items stored in wardrobes or under beds.
• Check shoes before putting them on, particularly if shoes have been sitting in a dark cupboard.
• Tuck sheets tightly under mattresses to reduce the chance of a spider climbing into bed.
• Don't trap spiders against your skin. If you feel a spider in bed, don't roll over or press against it, move calmly instead.

Chemical management

White tail spiders are not APVMA-regulated pests like cockroaches, termites, or ants, so there's no registered product specifically for them. General house sprays applied to walls, ceilings and corners at the label rate will suppress populations as part of routine pest management, but the effort is usually not worthwhile given how rare and mild bites are. Focus on habitat removal first.

If white tails are frequent inside your home and you're very concerned, consider calling a Perth pest management professional to discuss your specific situation. We can inspect, identify the entry points or attractants (usually other pest infestations), and recommend next steps.

How common are white tail spider bites in Perth?

Bites are rare. Despite Perth's warm climate and the presence of white tails in many homes, serious reported bites are few. Most people who live in Perth for decades and occasionally see white tails never experience a bite. The spider's primary defence is to flee, not to bite. A bite only occurs when the spider is trapped or directly threatened.

The very fact that you're researching this suggests either you've been bitten (in which case, you'll be fine) or you're concerned about the possibility (in which case, be reassured: the simple habits above will further reduce already-low risk). Don't lose sleep over white tail spiders. They're not worth the panic.

Other spiders in Perth you might confuse with a white tail

White tails are sometimes mistaken for:

• Huntsman spiders - larger, wider body, faster movement, much more willing to be in open spaces on walls and ceilings during the day.
• Vagrant spider - similar brown colour and size, also nocturnal and occasionally found indoors, but even less common.
• Trapdoor spiders - more stout-bodied, usually found outdoors near burrows, not commonly in homes.

If you've seen a large spider on your ceiling during the day that didn't move away from light, it's almost certainly a huntsman, not a white tail. Huntsmen are harmless to humans, and they eat cockroaches and other household pests, so they're genuinely welcome companions.

Frequently asked

Can a white tail spider bite you through clothing?

Unlikely. The fangs are small and the force is low. Bites usually occur when the spider is directly against bare skin and pressed or trapped. Clothes provide a physical barrier. Don't assume you've been bitten just because you felt a pain - many things cause pain, and spiders biting through fabric are a rarity.

Do white tail spiders bite while sleeping?

Very rarely. Bites happen when a spider is trapped between you and something else (like a pillow or the mattress). If you shift position, most spiders will flee. Tucking sheets tight and shaking out bedding before getting in reduces this further. Thousands of Perth residents share homes with white tails and sleep soundly every night without incident.

How long does the pain from a white tail spider bite last?

Initial sharp pain usually subsides within 15-60 minutes. Redness and mild discomfort can persist for several hours to 24 hours. After 48 hours, most bites are completely resolved. If pain is persisting beyond three days, consider whether it might be a different cause (a skin infection, a mosquito bite that became infected, or an unrelated minor injury).

Are white tail spiders native to Australia?

Yes, both Lampona cylindrata and Lampona murina are native to Australia. They've been here far longer than European settlement. They're found across eastern and southern Australia, with presence in Perth and surrounding regions confirmed since at least the mid-20th century.

Will a white tail spider bite if you don't bother it?

Almost certainly not. White tails bite only when they feel threatened, trapped, or pressed against skin. If you see one on a wall, the safest approach is to leave it alone or gently guide it outside with a cup and paper. It will not chase you, attack you, or bite unprovoked.

What should I do if I find a white tail spider in my home?

The simplest and kindest approach: catch it gently in a container (a glass over the spider, then slide paper underneath), and release it outside. Or leave it alone, it will eat other spiders and insects. If it genuinely bothers you, call a Perth pest management professional and ask about a general interior spray as part of routine household pest management. We can advise whether it's necessary.

Is the red or purple mark after a white tail bite a sign of necrotic venom?

No. The redness and swelling are normal inflammatory response to any wound, including an insect bite. This is your immune system responding appropriately. Necrotic venom causes tissue death, which manifests as a dark, sunken lesion that worsens over days. A normal white tail bite does the opposite: it improves rapidly over the first 24 hours. If you're concerned a lesion is worsening, contact your GP, but most white tail bites will simply fade.

Can you be allergic to a white tail spider bite?

Theoretically yes, but it's exceptionally rare. Someone with a documented allergy to insect venom might react more severely to a white tail bite than the general population. If you know you have such an allergy, carry an EpiPen and consider informing your GP that you've been bitten. For everyone else, allergic reactions to white tail bites are not documented in Australian medical literature.

Should I use antihistamine cream on a white tail spider bite?

It won't hurt, and some people find it soothing, but it's not necessary. Cold compress and ibuprofen are more effective. If itching is severe enough to disrupt sleep, an antihistamine might help, but oral ibuprofen is generally the better choice for reducing both swelling and pain simultaneously.

If you've been bitten or you're concerned about white tail spiders in your home, get in touch. We can inspect, identify what's bringing them in, and discuss whether any action is needed. Most of the time, the answer is reassurance and some simple habits, which is exactly what we'll give you. Spider management in Perth starts with understanding which spiders are a genuine threat and which are simply neighbours. If you want to understand more about common household pests and their risks, check out our guide to pest control investment in Perth.

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