 Spiders
Spiders are invertebrates with a two part body (phalo thorax and abdomen), biting chelicerae and silk glands that discharge through spinnerets. They have 4 pairs of legs and additional pair of short appendages (pedipalps) beside the chelicerae. Eight is not only the number of legs spiders have. The original spiders and most still have eight eyes and if that is not enough spiders still live today which have the original complement of eight spinnerets. Red Back Spiders Almost too familiar to need description, mature female redbacks are jet black spiders with a variable red stripe on the back of their spherical abdomen. Their tough, untidy webs are usually near the ground with the spider hiding in a shelter in a corner, often guarding her round woolly egg sacs. Immature females are smaller, usually brown with whitish markings. Males are rarely seen; they are small and brown with red and white markings.
Redback bites occur frequently. They can cause serious illness and have caused deaths. Because of their small jaws, many bites are ineffective. Common early symptoms are pain, sweating (always including local sweating at the bite site), muscular weakness, nausea and vomiting. An antivenom is available - no deaths have occurred since its introduction. Apply an ice pack to the bitten area to relieve the pain. Do not apply a pressure bandage (venom movement is slow and pressure worsens pain). If possible, collect the spider for positive identification. Seek medical attention.  Black Widow or Black House Spiders
These are timid spiders with bites occurring infrequently, but may be quite painful with local swelling. Nausea, vomiting, sweating and giddiness sometimes occur. Use an ice pack to relieve local pain and seek medical attention if the symptoms persist. Funnel Web Spiders The bite is dangerous and can cause serious illness or death. The male venom is more toxic than the female and initial symptoms include local pain, mouth numbness, vomiting, abdominal pain, sweating and salivation. There is an anti- venom available.
Bites are usually on a limb. Immediate action should be taken to apply a pressure bandage and immobilise the bitten limb by splinting. Restrict the movement of the victim. If possible, capture the spider for positive identification.  Huntsman Spiders
Bites usually result only in transient local pain and swelling. However, some Shield Huntsman Spider bites can result in prolonged pain, inflammation, headache, vomiting and irregular pulse rate. An ice pack may relieve local pain, however, seek medical attention if the symptoms persist.  Mouse Spiders
Mouse spider venom may be very toxic, but only one serious envenomation has been recorded, other bites causing minor effects. Funnel Web spider anti-venom may be effective. Until more toxicity data is available it is prudent to treat as for funnel web spider bites, especially if the victim is a child. Where possible, collect the spider for positive identification.  Orb Spiders
Males are often much smaller than females and both are reluctant to bite. Symptoms are usually negligible or local pain only with numbness and swelling with occasional nausea and dizziness. Seek medical attention if symptoms persist. Sac Spiders Bites are not common and symptoms are usually minor, including local pain and swelling. Symptoms may also include headache, dizziness, sweating, nausea and local skin ulceration, though most such reports relate to overseas experience.
Seek medical attention if symptoms persist. White Tail Spiders Symptoms are usually confined to local mind stinging or burning pain, sometimes followed by development of an itchy lump. Less commonly, bites result in swelling, discolouration and local ulceration, sometimes with nausea and vomiting. There is no conclusive evidence that these spiders regularly cause significant skin damage or ulceration.
An ice pack may relieve local pain. Seek medical attention if symptoms persist. Wolf Spiders Symptoms are usually confined to local mind stinging or burning pain, sometimes followed by development of an itchy lump. Less commonly, bites result in swelling, discolouration and local ulceration, sometimes with nausea and vomiting. There is no conclusive evidence that these spiders regularly cause significant skin damage or ulceration.
An ice pack may relieve local pain. Seek medical attention if symptoms persist.  Trapdoor Spiders
Brown trapdoor spiders are often mistaken for Funnel Web spiders but their bites are not dangerous - local pain and swelling may occur. The same goes for the Sigillate Trapdoor Spider, although there is one report of unspecified "severe effects". Seek medical attention if symptoms persist. | 
