Protecting Your Property & Family from Dangerous Spiders When Dealing with Spider Problems in Your Home
Spiders can be a particular nuisance. They are attracted to warm, dark small spaces, like wall cracks, corners, vents, and have been found in shoes and children’s toys in the yard area. Other species prefer to stay closer to the outdoors, weaving their webs in your garden or near your outside lighting for a easy dinner.
Most spiders are a nuisance primarily because of their webbing.
Spiders are the largest group of the 8-legged (Arachnid) arthropods, which includes scorpions, mites and ticks.
They are a diverse group containing more than 34,000 sub-species, varying greatly in size, appearance and behaviour.
Typically, spiders possess an extra pair of limbs called palps located between the main limbs and the mouth (these can be used for mating or for the detection and handling of prey), and have four pairs of eyes, though some species have less.
Other than the ocean and Polar Regions, spiders have adapted to almost every area on Earth, including human habitations and some aquatic environments.
Unlike insects, which have three-part bodies, the body of the Spider is made up of two sections the cephalothorax, which contains the head and the limbs, and the abdomen which contains internal organs.
In Australia there are two main varieties:
Primitive Spiders – which have two pairs of lungs, two pairs of silk-spinning organs found on the abdomen (spinnerets) and a vertically-working mouth Modern or True Spiders – which have one pair of lungs, three pairs of spinnerets and horizontal-working mouths (some also possess a cerebellum, an organ used for producing very fine silk) Around half of known Spider species use silk to produce webbing; silk can have tensile strength greater than steel and elasticity close to that of rubber.
And many spiders use it for more purposes than constructing webs such as:
Creating a “safety line”, make sacs to carry and protect eggs, help transfer semen during mating, catch the wind like a sail, allowing the Spider to glide (known as ballooning), make covering for a shelter or burrow.
Other than the use silk to catch prey, some Spider species actively seek out prey and hunt by pouncing or through the use of venom.
Venom is injected using a pair of hollow, chitinous fangs which act like hypodermic needles. Though Spider venoms are intended for use on other arthropods, some species can still affect humans.
In Australia, the two varieties known to cause deaths in humans are the Red Back Spider (Latrodectus mactans hasselti) and the Sydney Funnel Web Spider (Atrax robustus).
As with many kinds of insects, Spiders mature by moulting their exoskeleton, reaching full maturity after their final moult.
Once sexually developed (usually taking between 6 – 12 months), the male will typically cease all activity (including feeding) and seek out a reproductive partner.
Male Spiders will eject their sperm from their abdomen (usually on to a specially spun section of web) then load the sperm into reservoirs located in his palps and seek out a female.While it is true that in some species males are killed as part of mating, in many species the male is able to mate multiple times before reaching the end of their lifespan.
Sperm is stored within the female and eggs are fertilised as they are laid, with the number that can be laid at a time varying from less than a dozen to thousands depending on the species.