Australian Spider Bite Questions Answered by a First Aid Trainer

About the Spiders

How do I tell the difference between a redback and a funnel-web spider?

They look very different, and that difference matters enormously for first aid.

A redback is small — about the size of a large grape at most — and black with a distinctive red or orange stripe on the upper abdomen. Females are the ones that bite and are more venomous than males. They build messy, irregular webs in dry, sheltered spots — letterboxes, under furniture, in sheds, on children's play equipment. If you live in regional Australia, you have almost certainly seen one.

A funnel-web is significantly larger — at least 2 cm in body length — dark and glossy, with large, visible fangs. They do not build the kind of webs you would notice in a corner. They live in burrows in moist, sheltered garden environments — under rocks, in woodpiles, near pool filters. In eastern Australia, the male wanders during warm, humid weather looking for mates, and that is when bites happen.

The key practical rule from ANZCOR: any bite from a large, dark-coloured spider in Sydney, the Blue Mountains, Hunter Region, Central Coast, or south-east Queensland should be treated as a suspected funnel-web bite until confirmed otherwise. Do not wait for identification before applying the pressure bandage and calling 000.

Are there funnel-web spiders in regional NSW — places like Dubbo, Broken Hill, or Tamworth?

No — funnel-webs are primarily an east coast spider. They are not part of everyday life in Dubbo or the far west. The primary spider bite risk in inland and western NSW is the redback, which is present year-round in every state and territory.

However — and this is important — if you travel from regional NSW to Sydney, the Blue Mountains, the Hunter, or the coast, you move into funnel-web territory. Many families from Dubbo make that trip regularly. Make sure your car kit has a pressure bandage in it before you head east.

Are redback spider bites actually dangerous, or is it overstated?

They are genuinely painful and can cause a condition called latrodectism — symptoms include sweating, nausea, intense localised pain, and in some cases, elevated blood pressure and muscle spasms. For healthy adults, a redback bite is rarely life-threatening. For children, elderly people, or anyone with underlying health conditions, it can be more serious.

The good news is that redback antivenom has been available since 1956 and is highly effective. The key is seeking medical attention — do not try to manage a redback bite at home and wait to see how it develops. Call 13 11 26 for guidance, and call 000 if symptoms are severe or the person is a child.

The other thing I always say: redbacks account for around 2,000 recorded bites per year in Australia. That is the most of any venomous spider. They bite when disturbed — which is why letterboxes, outdoor furniture, and shoes are such common bite sites. The bite is not always obvious initially. If you have been in a location where a redback might be and you feel an unexplained sting or ache, check the area and call for advice.

About the First Aid

Why can't you use a pressure bandage for a redback bite?

I get this question constantly, and it is a good one. The reason is in the venom itself.

Funnel-web venom spreads through the lymphatic system — which is driven by muscle movement. A pressure bandage slows lymphatic flow, which slows venom spread. That is why it works for funnel-web bites and snake bites.

Redback venom is different. It acts locally and spreads slowly — it does not travel rapidly through the lymphatic system. Applying a pressure bandage to a redback bite does not slow anything useful. What it does is concentrate the venom at the bite site, significantly intensify the localised pain, and restrict circulation without any benefit. The Australian Venom Research Unit and ANZCOR both specifically advise against it.

This is one of the most practically important pieces of first aid knowledge for Australians, because the instinct — particularly if you have had snake bite training — is to reach for the bandage. For a redback, that instinct is wrong.

What if I am not sure which spider it was?

Call the Poisons Information Centre on 13 11 26 immediately — they are available 24 hours, 7 days, and they deal with exactly this scenario constantly. Describe the spider as best you can, describe the bite location and any symptoms, and they will advise you on what to do.

If the bite is on the east coast and symptoms are progressing rapidly — sweating, muscle twitching, tingling around the mouth, difficulty breathing — call 000 and treat as a funnel-web bite until confirmed otherwise. A photo of the spider on your phone is useful for hospital identification, but should never delay calling for help.

One practical note: do not try to catch or kill the spider. Further bites are a real risk, and the hospital does not need the spider — they need the information about the bite and the progression of symptoms.

How tight should the pressure bandage be?

This is the most common practical failure point in pressure immobilisation technique. Research consistently shows that bandages applied in the field — by trained and untrained people alike — are almost always too loose.

The correct pressure is comparable to what you would apply for a sprained ankle. You should not be able to easily slide a finger underneath the bandage. The fingertips or toenails of the affected limb should remain pink — if they turn white or blue, the bandage is too tight and needs to be loosened slightly.

If you are using a dedicated snake and spider bite bandage with tension indicators — which I strongly recommend — the indicators change shape when the correct pressure is reached. That removes the guesswork from a technique where getting the tension wrong significantly reduces effectiveness.

Watch the technique in my videos — I filmed them as snake bite bandaging, but the method is identical for funnel-web bites:

See the funnel-web bite guide with bandaging technique videos →

Can you do the pressure bandage on yourself?

You can apply a bandage to your own arm — it is harder but it is possible. The challenge is achieving consistent pressure while bandaging solo, and immobilising the limb adequately once the bandage is on.

If you are alone, the priority is to call 000 first and then apply the bandage while you wait. Do not attempt to drive yourself to hospital — getting behind the wheel means moving the limb and potentially losing consciousness while driving. Stay still. Wait for help. Apply the bandage as best you can.

Practice matters here enormously. If you have never applied a pressure immobilisation bandage, now is the time to learn — not in an emergency. I have videos on the technique linked in our full guide.

About Kids and Neurodiverse Children

Are children more vulnerable to spider bites than adults?

Yes — for both spider types, children are more vulnerable due to their smaller body mass. The same dose of venom has a proportionally greater effect in a child. For funnel-web bites, the urgency is even higher. For redback bites, children and elderly individuals are the groups most likely to experience serious illness and are specifically flagged in the ANZCOR guidelines as requiring closer monitoring.

Children are also more likely to be bitten in the first place — because they put hands and fingers into places without looking, sit on outdoor furniture without checking underneath, and play near garden sheds and letterboxes. Teaching children not to put fingers into dark gaps, and modelling the habit of checking before reaching in, is genuine risk reduction.

My child is autistic and hates being touched. How do I apply a pressure bandage in an emergency?

This is one of the questions I care most about answering properly, because it is one nobody else is writing about from this angle.

The short answer: regulate before you treat. Headphones on. Comfort object in their hands. Familiar face close. Unfamiliar people moved back. Voice low and slow. Narrate every step before you touch the child. Predictability is regulating for autistic children — surprises are not.

I have written a full dedicated guide on this: Snake Bite First Aid for Neurodiverse Kids: A Step-by-Step Guide. The technique is the same as for a snake bite — ANZCOR pressure immobilisation — with neurodiverse-specific adaptations at every step. If your child is autistic or has sensory processing differences, read that guide and practise the approach in a calm moment before an emergency occurs.

Also: keep a completed All About Me emergency card in your first aid kit. When the ambulance arrives, hand it over immediately. It tells the paramedics exactly how your child communicates, what their sensory triggers are, and which regulation tools to use. It does the briefing for you when you cannot do it yourself.

About Kit Preparation

What is the single most important thing I can do to prepare for a spider bite emergency?

Know the difference between the two bites before something happens. Not during. Before.

The pressure bandage vs ice pack distinction is the one that matters most. If you remember nothing else from this page: funnel-web — pressure bandage. Redback — ice, no pressure bandage. Print the free poster. Put it on the wall. Save 13 11 26 in your phone right now.

After that: check whether your first aid kit actually has both a pressure bandage and an ice pack in it. Most generic kits do not. If yours does not, that gap needs to be filled before you need it.

Do I need a snake bite kit or a spider bite kit — or are they the same thing?

The pressure immobilisation technique — and the kit contents required to apply it — are identical for snake bites and funnel-web spider bites. Both venoms travel through the lymphatic system, both require a broad elasticised bandage, a splint, and immobilisation. So a good snake bite kit covers funnel-web bites.

The difference is the redback. A snake bite kit focused purely on pressure immobilisation may not include an ice pack — which is what you need for a redback bite. The Snake Bite Max Kit and the Family First Aid Kit both include a pressure bandage and an ice pack — covering all three scenarios: snake bite, funnel-web bite, and redback bite.

How often should I check and replace items in my spider bite kit?

Check your kit annually at minimum — and particularly at the start of each spring, before spider season peaks. Things to look for: elasticised bandages that have lost their stretch or are past their use-by date; instant ice packs that are past expiry or have been previously activated; permanent markers that have dried out; splints that are cracked or compromised. Replace anything that is not in perfect condition. A kit you cannot rely on is not a kit.