White Tail Spider

Lampona cylindrata and Lampona murina

Variously known as White Tail spider, Whitetail spider, White-tail spider,  Whitetailed spider, White Tailed spider etc.; this Australian invader was first recorded in New Zealand in 1886, at Waiwera, Auckland. It is believed that it came into the country with early colonists and is now well established throughout the North Island and is prevalent in many parts of the South Island including Nelson and Christchurch. They are common in urban dwellings.

White Tails are active hunters, preying upon other types of spiders, and may be found roaming inside houses, especially in warmer weather. White Tail spiders have been implicated in cases of ulceration or necrosis following spider bites. The incidence of ulceration following White Tail spider bite is not known. The majority of cases appear not to develop ongoing ulceration, although blisters and redness are common.

There is much discussion about the danger of White Tail spider bites. Many people are convinced that the cause of their serious ulceration was the bite of a White Tail, but there is little hard scientific evidence either way. Perhaps it is better to be safe than sorry?

How do I know a white tailed spider when I see one?

White Tail Spiders are slender looking, 1-2 cm in length, typically grayish or sometimes brownish in colour with orange to brown banded legs and usually with a distinct cream-white marking on the tip of the tail. Males and juveniles may have additional white markings; two spots on either side of the abdomen.

The leg span of a fully grown specimen is about the size of a fifty-cent coin. The two species present in New Zealand: Lampona cylindrata and Lampona murina cannot easily be distinguished from one another without close examination under a microscope.

Where are they found?

The White Tail spider’s preferred habitat is under dry bark and plants, but they will often be found inside houses, where they look for shelter from the light after hunting at night. They are also known to move indoors in the winter to seek shelter from the cold and there they find plenty of their favourite prey; grey house spiders.

The White Tail spider often hides in clothing and shoes, especially if they have been left lying on the floor. AsWhite Tails eat many other kinds of spiders one sign that White Tail spiders are sharing your house is that there are few cobwebs and there are no other spiders to be found.

The nests of White Tail spiders are tangled masses of webbing. These are often found in dark dry areas such as roof voids.

Hunting Characteristics

These spiders do not build a web to catch their prey as they are active hunters. They are rather unusual in that they specialise in catching other spiders, particularly the common grey house spider.

The White Tail spider will cautiously enter the web of its intended victim and mimic the struggles of a trapped insect by plucking at the web. This may trick the resident spider into investigating the disturbance and so instead of gaining a meal, it becomes one when the White Tail strikes.

Signs of a White Tail Spider Bite

There are numerous accounts of particularly nasty bites that are allegedly caused by White Tail spiders. However, the evidence that these spiders are responsible for these particularly nasty bites is weak in many cases.

Where these spiders are positively identified as causing a bite, the bite will cause instant pain followed by typical symptoms including ongoing pain, discomfort and swelling at the bite site. The bite can develop into a small ulcerous wound which can look similar to a boil. It normally heals within a week. In some instances, victims report flu-like symptoms. Particularly nasty infections can leave scarring. Only a few bite victims will have a truly nasty reaction to a White Tail spider bite. Infection of the bite area seems to be a far more likely cause of medical problems than the spider's venom.

If a nasty reaction to the bite does occur, symptoms may include nausea, vomiting, dizziness, lethargy and headaches. An icepack should be applied to the area to stop the swelling. White Tail spiders will only bite if provoked and in most cases the bite will cause little harm. However, as with bee/wasp stings different people will react to a bite in different ways.

In any case, spider bites should always be cleaned and watched for signs of infection. Should any adverse symptoms occur always seek medical advice.

Check out Animal Planet TV program on You Tube.

Spider Proofing - How to get rid of spiders and protect yourself from White Tailed and other spiders

1. The roof void is often the place that these spiders lurk and build their nests. Spray the roof voids with residual insecticide NO Bugs Super or NO Spiders, both available in a concentrate or a ready to use trigger spray or use a bug bomb fumigator NO Bugs Bug Bomb or Borafume if the voids are hard to access.
2. Spray interior areas where spiders have been seen and corners of ceilings, around doors and window frames, skirting, under and behind furniture, in clothes cupboards and hot tank cupboards.
3. Spray exterior areas where webbing has accumulated (do not remove webbing until one week after spraying). Spray eaves, around windows and doors, vents, downpipes, wall bases, washing lines and decks.

NO Bugs Super contains the active ingredient Deltamethrin and NO Spiders contains Permethrin which are both potent, safe and UV stable synthetic pyrethroid insecticides.

Unlike the active ingredients in most fly sprays with ingredients that break down in UV light rapidly (sometimes less than three hours), Deltamethrin is UV stable and will retain its residual insecticidal efficacy for up to four months even in full direct sunlight. It is consequently very useful for treating the spiders around both the outside and inside of your house.

In general insects are one thousand times more susceptible to Deltamethrin than other ingredients and white tailed spiders are no exception to this rule as they are particularly susceptible to Deltamethrin.

Kiwicare's NO Bugs Super available in a ready to use 500ml trigger spray or concentrate form contain Deltamethrin. Just follow the easy to read instructions on the product for application around the home, and enjoy the peace of mind created by knowing that your home is protected from the particularly nasty White Tail Spider.

NO SPIDERS CONCENTRATE

Safe, effective surface spray provides control of spiders for up to 2 months outside or 3 months indoors.  Spider proof your home. NO Spiders flushes Whitetail spiders from their hiding places and as they walk over the treated surfaces they will die.  Spray exterior areas such as spouting, gutters, windows, doors, under eaves, and ventilators. Interior spray around windows, doors, corners, and areas where spiders have been noticed. NO Spiders is effective against spider mites and other insects in ornamentals and conifer.

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NO SPIDERS TRIGGER SPRAY

Ready to use version of the NO Spider Concentrate. No dilution required.  Handy to have to quickly spray areas where spiders, including Whitetail, have been seen.  Spray areas around the house as detailed in the NO Spiders Concentrate information.

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Alternatively use:

NO BUGS SUPER CONCENTRATE and NO BUGS SUPER TRIGGER SPRAY

NO Bugs Super is an excellent broad spectrum insecticide giving long term control of most crawling and flying insects and spiders. This is a good alternative to NO Spiders Products.

NO BUGS BUG BOMB

Use this product for a quick knockdown of insects such as, Borer on the wing, Silverfish, Booklice, Weevils, Moths, Fleas, Flies, present in the room at the time of release.  To maintain a bug free environment use NO Bugs Bug Bomb in conjunction with the appropriate long term treatment such as Kiwicare NO Bugs Super, NO Borer, NO Fleas Total.

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NO BUGS BORAFUME FUMIGATOR

This fumigator is activated by a reaction between water and the chemical inside the Borafume fumigator.  The fumigator will kill borer ‘on the wing’ and other crawling / flying insects, including spiders, present at the time of its activation.  Borafume is especially good at flushing out and killing cockroaches.  For long term control, follow up with a Kiwicare NO Borer residual treatment.

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