Most spiders are more of a nuisance than a pest, but they do keep insect numbers down. of the spiders found in and around the Queensland homes and buildings, only the redback spider is considered an important pest. While there are other dangerous spiders in Queensland, they are not considered very serious.
Appearance and habits
Grey House Spider
The Grey House Spider is commonly found in Queensland houses. They do not cause any trouble apart from forming unsightly webs, particularly in the corners.
This small spider is 8mm to 9mm long, roughly spherical with long thin brown legs. Down the middle of their backs are a burnt orange stripe or patch.
The adult female sits upside down in her web, which consists of a loose, untidy tangle of sticky threads. The female will drop immediately to the ground when disturbed. Although it sometimes mistake for the redback spider, the bite of the grey house spider is not harmful.
The white-kneed is also a common spider in the house. They do not cause any problems except to be unsightly.
It is 1.5cm long. The abdomen is black grey with white patches below the joints, particularly on it’s fore legs.
The webs is wheeled shaped with an oval patch of silk in the middle, where the spider rest in the regular characteristics pose.
It is non-venomous, using large amounts of silk to overcome its prey.
The daddy long legs belongs to the family pholcidae of which the species pholcus phalangioides is most commonly found in Queensland homes.
These spiders have a small body and long thin thread-like legs. The female of the common species is 7 to 8mm in body length with its legs up to 50mm long.
The web is a tangle of irregular soft strands which looks like a rough horizontal sheet about 25cm across.
The spider hangs up side down within the nest, and remains there at all times. it is usually found in dark places, such as behind doors and in garages, sheds, boxes, closed rooms and under stairs.
The red back spider is wide spread in Australia, and other countries. In New Zealand it is known as the Katipo, and in America it is known as the Black Widow. They are known for the poisonous bite.
The female is 8 – 14mm with the front part of her body much smaller than the large pea shaped abdomen. Their legs are long and thin
The body is usually dark, almost, black with a bright cherry-red stripe down the back of it’s abdomen and a hour-glassed shape on its underside.
The male is much smaller than the female, and is rarely seen.
The upper area of the web, where the adult sits, is connected to a lower are of the web where the prey is snared . Webs are built in cool, dry shady areas with a minimal chance of disturbance such as around houses, farm sheds, factories, machinery. Although it likes to nest across open areas it will nest in wood piles, rockeries, logs and the bush toilets.