Aussie Spider Bites: A First Responder Guide

We talk about blood.... a lot... But today's topic is very different! We’re often asked how first aid for spider bites differ from snake bites, and specifically what bites to use the PIT on. Since we’ve already covered snake bites here, we thought it's a good time to talk about Aussie spider bites. Not every Australian spider is alike—treatments vary significantly, so we’re approaching this guide species by species, from most dangerous to least. This blog equips you with the knowledge to manage bites like funnel-web and redback, covering symptoms, treatment, and myths.

Funnel-web Spider

Appearance, Behaviour, Habitat, and Avoidance

“Funnel-web spiders live in the moist forest regions of the east coast and highlands of Australia from Tasmania to north Queensland. They are also found in the drier open forests of the Western Slopes of the Great Dividing Range and South Australia's Gulf region” (Australian Museum, n.d.).

While these spiders tend to stay outside, burrowing in moist, sheltered spots (rocks, logs, tree crevices), male funnel-webs have been known to wander into homes, sheds, or work boots during summer/autumn, especially after rain.

Avoid risking a run-in with Australia's most dangerous arachnid by keeping your home’s surroundings clear, wearing gloves when gardening and cleaning out sheds, and shaking your boots out before shoving your foot inside.

Symptoms of Their Bite

Bites cause local pain, redness, piloerection (hair standing up), sweating, muscle twitching, nausea, breathing difficulty, and confusion. Male Atrax robustus venom (Robustoxin) has caused all 13 reported funnel-web deaths; life-threatening effects can develop within 10 minutes, so swift medical attention is critical (ANZCOR, 2021).

Treatment

• Prehospital Treatment: Apply pressure immobilisation technique (PIT) immediately, as you would treat a snake bite. Wrap the Snake Bite Bandage firmly over the bite, covering the limb tightly. Immobilise with a SAM Splint and keep your patient calm and still. Call 000, and start CPR if your patient is unresponsive and not breathing (ANZCOR, 2021).
• In Hospital: Antivenom is available for treatment of funnel-web spider envenomation in areas where these spiders are encountered in Australia (ANZCOR, 2021). This funnel-web-specific antivenom was developed in 1981 and works by neutralising the spider’s venom. Hospitals will monitor for shock or allergic reactions and push IV fluids and oxygen, where required.

FAQs and Myth-Busting

• Can funnel-webs jump? No, they can’t jump but they move fast and lunge when threatened (Australian Museum, n.d.).
• Can funnel-webs swim? They survive 30+ hours underwater, trapping air in abdominal hairs. Don’t assume a still funnel-web in the bottom of your pool is dead, as they can recover! (Australian Museum, n.d.)
• Are female bites safe? Female venom lacks Robustoxin, but their bites still need PIT and medical care (Australian Museum, n.d.).
• Myth: Sucking out venom will save you from life-threatening symptoms. Truth: This is a terrible idea. It’s ineffective and risks infection. Use PIT and call 000 instead (ANZCOR, 2021).

Redback Spider

Appearance, Behaviour, Habitat, and Avoidance

"Redback Spiders are found Australia-wide and will live almost anywhere as long as there is adequate food, a sheltered web site and warm enough for breeding. They are especially common in disturbed and urban areas, in association with human habitation."(Australian Museum, n.d.).

They create dense, messy webs in urban sheds, woodpiles, and gardens. Females bite when disturbed but the males rarely do. They’re nocturnal, and are often hiding in clothing or equipment. Keep your areas tidy, shake out old jackets and gear before use, and wear gloves when rummaging through dark corners to avoid a painful encounter.

Symptoms of Their Bite
Bites trigger sharp local pain, spreading to limbs, with swelling, sweating, and nausea. Redback bites are mostly only dangerous for children and the elderly. Symptoms start fast but serious illness is unlikely within 3 hours, though it's important not to delay care (ANZCOR, 2021).

Treatment

• Prehospital Treatment: Skip pressure bandages for redback bites—they actually just worsen pain. Apply an ice pack or cold compress to ease discomfort. Clean the bite with soap and water. Always call 000 for children and the elderly, as well as anyone who is experiencing severe pain or collapses. Start CPR if the patient is unresponsive and not breathing (ANZCOR, 2021).
• In Hospital: Redback antivenom is available in hospitals across Australia, to relieve severe pain or systemic symptoms. Painkillers like paracetamol are often sufficient for milder cases. Hospitals usually just monitor for allergic reactions or dehydration, using IV fluids and oxygen if needed (ANZCOR, 2021).

FAQs and Myth-Busting

• Do redback bites kill adults? Rarely. Pain and nausea hit hard, but adults recover with treatment. Kids and the elderly do need urgent care (ANZCOR, 2021).
• Are redbacks in cities? Yes, they are especially common in disturbed and urban areas, in association with human habitation.
• How soon does pain start? Immediately, spreading within hours. Use ice and call 000 if symptoms worsen (ANZCOR, 2021).
• Myth: Redback bites always need antivenom. Truth: Many bites resolve with pain relief and cold compress, but it's good to get checked out at the hospital regardless. 

White-tail Spider

Appearance, Behaviour, Habitat, and Avoidance
White-tail spiders roam homes and gardens, hunting other common house spiders at night. They don’t spin webs, preferring to hide in clothing, bedding, or under furniture. They are not necessarily aggressive but bites happen when they get trapped against skin. Check bedding, shake out clothes, and seal gaps in your home to keep them out of your space. 

Symptoms of Their Bite
Bites cause stinging, redness, and swelling, sometimes with itching. Ulcers are rare but possible. Systemic symptoms are uncommon, but it's important to monitor for worsening signs

Treatment

• Prehospital Treatment: Apply a cool compress to reduce pain and swelling. Clean the bite with soap and water. Elevate the limb if possible. Head to medical care if redness or pain persists, or if ulcers form. Start CPR if the patient is unresponsive and not breathing (St John Ambulance Australia, n.d.).
• In Hospital: Most bites heal just fine without hospital treatment. Rare ulcers may need antibiotics or surgical debridement. See a Doctor if you are concerned about infection.

FAQs and Myth-Busting

• Are white-tails dangerous? Not really, systemic effects are uncommon. Clean the bite and watch for infection.
• Where do they hide? In homes, hiding inside clothes or bedding while they hunt other common house spiders.
• Myth: White-tail bites always cause necrosis. Truth: Ulcers are rare; most bites heal with basic care (St John Ambulance Australia, n.d.).

Mouse Spider

Appearance, Behaviour, Habitat, and Avoidance
Mouse spiders dig complex burrows in moist soil and are not usually abundant in heavily populated urban areas. "The males are often encountered when they wander searching for females from late summer until April-May. They often fall into suburban swimming pools." (Australian Museum, n.d) They bite when provoked, so it's good to wear gloves when gardening, and clear debris to avoid a run-in.

Symptoms of Their Bite
Unlike funnel-web spiders, the mouse spider is believed to use less (or no) venom when they bite and severe cases are very rare. Bites mimic funnel-webs: sharp pain, sweating, nausea, and possible systemic effects. While life-threatening symptoms are very rare, they can escalate fast and it is important to provide immediate first aid (ANZCOR, 2021).

Treatment

• Prehospital Treatment: Apply pressure immobilisation technique (PIT) immediately, as you would treat a funnel-web bite. Wrap the Snake Bite Bandage firmly over the bite, covering the limb tightly. Immobilise with a SAM Splint and keep your patient calm and still. Call 000, and start CPR if your patient is unresponsive and not breathing (ANZCOR, 2021).
• In Hospital: Funnel-web antivenom works for mouse spider bites. Hospitals monitor for shock or allergic reactions, administering IV fluids and oxygen as needed (Australian Museum, n.d.).

FAQs and Myth-Busting

• Are mouse spider bites deadly? Potentially. They mimic funnel-web bites and need PIT and urgent care (ANZCOR, 2021).
• Are they common? Less common than other venomous spiders but more likely to see them in late summer till April-May
• Myth: Mouse spiders are harmless. Truth: Their venom can be severe; use PIT and get to a hospital to get checked out just in case.

Other Spiders

Most Australian spiders, like huntsman or cupboard spiders, are not worth stressing about. Bites may cause mild pain, redness, or swelling, but serious harm is extremely rare. ANZCOR (2021) advises, “All other spider bites should be treated symptomatically: apply ice or cold compress to lessen the pain.” Clean the bite with soap and water, monitor for infection, and seek medical care if symptoms persist.

How to Be Prepared for Any Spider Bite Emergency

You know how we like to be prepared for anything, here at TacMed Australia... And venomous spider bites are no exception.

We encourage every Aussie household, workspace and outdoor adventure set up to be equipped with a well thought-out trauma kit that includes everything you need to treat a multitude of emergencies—from major haemorrhage, fractures and airway obstructions to a run in with one of our many venomous creatures.

Learn the Pressure Immobilisation Technique (PIT) here: https://www.youtube.com/watch?v=B_oahsrfqe8

Get your First Aid Kit here: https://tacmedaustralia.com.au/collections/first-aid-kits

Summary

Contrary to popular world belief, not all Australian animals are out to kill us.

• Funnel-webs are the main concern, which do need urgent PIT and transport to hospital for antivenom.
• Redbacks can be dangerous for children and the elderly but most adults will only experience site pain.
• Mouse spiders rarely bite with enough venom to hurt you.
• According to ANZCOR, all other Aussie spider bites can be treated with ice and Panadol.

We hope this helped to clear up any common misconceptions about how to treat spider bites. If you've got any questions, we'd love to hear from you! Reach out to our team on 1300 962 633 or email info@tacmedaustralia.com.au.

Stay Safe,

Team TacMed.

FAQs

What's the most dangerous spider in Australia? The funnel-web spider, specifically the male Atrax robustus, is considered Australia's most dangerous spider. Its venom contains Robustoxin, which has been responsible for all 13 recorded funnel-web deaths. Life-threatening symptoms can develop within 10 minutes of a bite, making swift first aid and urgent medical attention critical.

Which spider bites require the pressure immobilisation technique (PIT)? Use PIT for funnel-web and mouse spider bites — treat these the same way you would a snake bite. Do not use PIT for redback bites, as compression actually worsens pain without providing any benefit.

How do I treat a redback spider bite? Apply a cold compress or ice pack to ease pain, and clean the bite with soap and water. Do not apply a pressure bandage. Call 000 immediately for children, the elderly, or anyone experiencing severe pain or collapse. Most healthy adults recover without antivenom, but it's still worth getting checked at a hospital.

Do all spider bites need a trip to the hospital? Not necessarily. Funnel-web and mouse spider bites require emergency care. Redback bites should be assessed at a hospital, especially for vulnerable individuals. White-tail bites and bites from other common spiders can usually be managed at home with a cold compress and monitoring, unless symptoms worsen or infection develops.

Should you suck out venom from a spider bite? No. This is a common myth and a bad idea. It's ineffective and introduces bacteria into an already compromised wound. Apply the appropriate first aid for the spider species involved and call 000 if required.

What should be in a first aid kit for spider bites? At minimum: snake bite bandages for PIT application, a SAM splint for immobilisation, a cold compress or instant ice pack, and wound cleaning supplies. A well-stocked trauma kit covers you for spider bites as well as a wide range of other emergencies.

References

• Australian and New Zealand Committee on Resuscitation (ANZCOR). (2021). Guideline 9.4.2: First aid management of spider bite. https://www.nzrc.org.nz/assets/Guidelines/First-Aid/ANZCOR-Guideline-9.4.2-Spider-Bite-Apr21.pdf
• Australian Museum. (n.d.). Funnel-web spiders. Retrieved April 21, 2025, from https://australian.museum/learn/animals/spiders/funnel-web-spiders/
• St John Ambulance Australia. (n.d.). Spider bites. Retrieved April 21, 2025, from https://www.stjohn.org.au/