Dangerous Spiders in Sydney
Sydney is home to two spiders worth taking seriously, the funnel-web and the redback, plus one with a fearsome reputation it does not deserve. Knowing how to tell them apart, and what to do if someone is bitten, takes the fear out of sharing the city with them.
First, some reassurance. Serious spider bites in Australia are rare, and modern medicine handles them very well. Effective antivenom exists for both the funnel-web and the redback, and there has not been a recorded death from a funnel-web bite since funnel-web antivenom was introduced in 1981. The aim here is not to scare you, but to help you recognise the genuinely dangerous species and respond calmly and correctly if you ever need to.
Funnel-Web Identification
The Sydney funnel-web is one of the most venomous spiders in the world, so it is the one to know best.
How to recognise a funnel-web
The males are the bigger concern, as they wander in search of a mate, particularly through the warmer months and after rain, which is when they turn up in homes, garages, laundries and shoes left outside. Funnel-webs can also survive for a time underwater, so it is worth checking carefully before scooping one out of a pool. Never handle a funnel-web or attempt to catch it by hand. You can read more about them on our funnel-web spider page.
Redback Identification
The redback is Australia's other famous dangerous spider, and one most people can picture, though it pays to know the details.
How to recognise a redback
Because redbacks like the exact spots people reach into without looking, most bites happen by accident, such as putting on a glove or moving something in the shed. They are a particular worry around children's outdoor play areas. A bite is painful and can make you unwell, so it should be taken seriously, though it is rarely life-threatening today. See our redback spider page for more.
The Truth About White-Tail Spiders
White-tail spiders have a fearsome reputation, and almost all of it is undeserved. They are slender, dark grey spiders with a small pale spot at the tip of the abdomen, common indoors, and they actually hunt other spiders rather than building webs.
The widespread belief is that their bite causes flesh to rot away in a spreading ulcer. This has been investigated, and the research does not support it. A large study of confirmed white-tail bites found no cases of the dreaded necrotic ulcers, and no link was established. In reality, a white-tail bite usually causes nothing more than local pain, redness and itching that settles down on its own. So while nobody enjoys being bitten, the horror stories are a myth, and there is no need to panic if you see one indoors.
If you are ever unsure: Do not put yourself at risk trying to identify or capture a spider up close. If a dangerous-looking spider is in the home, keep everyone clear of it and have the property treated. Identifying it from a safe distance is enough.
When Are They Most Active?
Dangerous spiders are not equally likely all year round, and knowing the high-risk times helps you stay alert when it counts. Funnel-webs are most often encountered in the warmer, more humid months and especially after heavy rain, when male spiders leave their burrows to wander in search of a mate and can end up indoors, in garages or in pools. Evenings and nights are when they move about most.
Redbacks are active through the warmer months too, and because they shelter in dry, protected spots they are a year-round presence in sheds and under furniture. The common thread is that summer, warm spells and the period after rain are when extra care pays off, particularly with shoes, gloves and anything stored outside.
Reducing the Risk at Home
You cannot remove every spider from a Sydney garden, but a few simple habits noticeably lower the chance of a dangerous encounter, especially for children. Wear gloves when gardening or moving rocks, logs and pots, shake out shoes and gloves left outside, and always look before reaching into sheds, letterboxes or under outdoor furniture. Keep play equipment checked, clear clutter and debris from around the home, and have funnel-web or redback hotspots treated professionally if they keep appearing. None of this is about living in fear, it is just sensible caution in spider country.
Bite First Aid
The correct first aid is different for different spiders, and getting it right matters. The following is general first-aid information. In any spider bite emergency, call 000, and for advice you can also call the Poisons Information Centre on 13 11 26.
Funnel-web or large black spider bite
Treat this as a medical emergency and call 000 immediately. Keep the person calm and as still as possible, since movement spreads the venom. The recommended first aid is a pressure immobilisation bandage, the same technique used for snake bite, applied firmly over the bite and along the limb with a splint, while you wait for help.
Follow the 000 operator's instructions, and get the person to hospital, where antivenom is available.
Redback or white-tail bite
For these, do not apply a pressure immobilisation bandage, as it is not recommended and can increase the pain. Instead, apply a cold pack to ease the pain and seek medical advice.
For a redback bite, see a doctor, especially for children, older people or anyone who becomes unwell, as antivenom is available if needed. If severe symptoms develop after any bite, call 000.
That single distinction, pressure immobilisation for a funnel-web but a cold pack and no bandage for a redback, is the most important thing to remember. When in doubt, calling 000 or the Poisons Information Centre will get you the right advice quickly.
Dangerous Spiders Around Your Home?
The best peace of mind is not having them there at all. We treat the areas funnel-webs and redbacks shelter, especially around family homes.
See our funnel-web spider controlSydney's dangerous spiders deserve respect, not dread. Learn to recognise the funnel-web and the redback, treat the white-tail myth for what it is, and keep the correct first aid in mind. With antivenom available and serious outcomes now rare, knowing these few facts is genuinely all most people need to live alongside them safely.