A little bit about Spiders . . .
Apart from several types of indigenous Australian spiders, whose bites are often dangerous and occasionally life threatening, most are relatively harmless. However, they sometimes bite humans that encroach on their habitat. Any spider bite should receive medical attention as blood poisoning or an infection could possibly result.
Apart from widespread and sometimes pathological fear of spiders, the most common reason for control is the elimination of unsightly webs.
Spiders can be readily distinguished from insects: they have 8 legs instead of 6 and they have 2 body segments instead of three – the head and thorax are fused into one unit which contains eyes, mouthparts and legs. The abdomen section is soft and also houses the reproductive organs, the silk glands and spinnerets, and the respiratory openings that are visible on the under surface like the pages of a book. This large surface area achieves the transference of oxygen into blood. There are usually 4 pairs of eyes; each a simple lens. The arrangement of these eyes in a pattern is constant for each species and is an aid to identification. The fine hairs and setae on various parts of the body are said to be sensitive to taste, touch and vibration.
Most spiders, being nocturnal, are seldom seen during the day unless disturbed. Those which depend on webbing to snare their prey seldom move far and hide in a crevice, curled leaf or appear camouflaged as twigs. Hunting spiders such as the huntsman are ground dwellers and are not dependent on webs for food.
Males seek out females at mating time. Male spiders have long palps alongside their jaws. These sometimes could be confused as another set of legs, but they are long for the purpose of picking up their sperm and depositing it in the genitalia of the female. After mating, the male often 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.