The bite of the same poisonous spiders may trigger different reactions in separate individuals, since personal sensitivity to the toxins in the venom matters a lot. In geographical areas where poisonous spiders are known to live, people often learn how to differentiate them from the non-toxic species that are frequently encountered around the house. It all depends on the body part where you've been bitten; when the spider bites occur on the arm or the leg, tie a bandage right above the bite so as to prevent the spreading of the venom. Nevertheless, too tight a bandage may affect the correct blood flow in the area. A cold cloth pressed on the wound will reduced the swelling and the redness associated with spider bites in general. Warmth and humidity make the perfect habitat for the funnel web spider, nevertheless, they also suffer from heavy rains that destroy their burrows. In the aftermath of such events, the funnel web spider redoubles its level of activity so as to get its life back on track. The size of the species varies from 1.5 to 4.5 centimeters for the body length; they are mono-color, dark brown usually, without any patterns at all. Experts in the field often say that spider identification is tricky since very many species resemble each other, and the venomous and the non-venomous ones are found in a complex who's who relationship. Presently, there are all sorts of devices that allow people to catch and analyze the spiders that live in their homes so as to find out whether they are poisonous or not. The huntsman spider is easy to be taken for a tarantula, but it is harmless to humans; it never bites unless provoked, and the wound is superficial and healing in just a couple of days. The size of the huntsman spider may seem impressive, as it has no less than three centimeters in leg-span. The legs of the huntsman spider are actually the characteristic element for the species: rather than having them attached vertically to the body, they are twisted, with a crab-like appearance. A clear example here is the distinct tangled web the black widow makes; yet, spiders also create webs for the protection of their nests. Placed above their home web, such silky defenses lower the vulnerability of spiders in front of aerial predators. There are other spiders which do not depend on webs for survival, and one famous example of such a species is the giant tarantula.