Pest Control Specialist

Pest Profiles


Spiders


  • Spiders

    PROFILE

    Apart from several types of indigenous Australian spiders whose bites are often dangerous and occasionally life-threatening, most are relatively harmless. However, any spider bite should receive medical attention as soon as possible as blood poisoning or an infection may result.

BIOLOGY

Those spiders which depend on webbing to catch their prey rarely move far and usually hide in such places as cracks and crevices, leaves, or camouflage as twigs. Hunting spiders, most of which are ground dwellers, are less dependent on webs and move around mainly at night in search of food.


Male spiders seek out females at mating time. After mating, the male becomes an immediate high protein meal to assist the egg production of the female. The eggs are usually deposited into a silken sac produced by the female. The spiderlings hatch inside the sac and moult once before they emerge. They must find their own food and disperse quickly in search of it. After several moults they become adults and those that survive can usually expect to live for 1 - 3 years.


Whether the spider traps the prey in a web or hunts to capture it, the victim is injected with venom through the fangs which immobilises it. The body is then squeezed amd the erupting liquid is sucked in through the small mouth behind the fangs at the base of the palps. Most species can survive for months without food. This is just as well as insect prey is usually scarce in the colder months.


Silk or web is produced from the glands in the abdomen and deposited through the spinnerets. The orb-weaving spiders produce an adhesive silk for the snare area of the web and drier silk for the radii and guy lines. In some species, spiderlings let out sufficient web into the air to lift and carry the away.


SPECIES

With several types of spiders having a potentially lethal bite, it is important to know one from the other.


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