More likel scorpions, the camel spider is part of an arachnid order known as the solifugae; they live in arid hot climates, including deserts from both the Northern and the Southern hemispheres. There are even some camel spider species with a more special habitat: they live in forests and in grassland. In its natural habitat the species prefers rotten tree bark as the favorite place to make the nest, but it is also found in alls sorts of house corners. The only habitat specificities that matter are retreat and low moisture levels. Brown recluse spiders are not dangerous or aggressive; the only cases of bites occur when these creatures somehow get tangled in clothes, towels or even bed sheets. Though the generic name of the funnel web spider is used most of the time, it includes no less than thirty-six species that live both on land and in trees. The favorite habitat of the funnel web spider consists of the moist area under rocks, crevices, rotten trees, holes and tree bark. For the funnel web spider varieties that live in gardens, shrubs are the perfect place to make their nests. Even in North America there are three different types of the black widow spider and their classification is made according to the geographical area where they live: there is the northern black widow, the southern black widow and the western black widow; thus the species is widely spread from the south of Canada to Mexico. However, people who have been bitten may expect to experience headaches and a general feeling of malaise. Sometimes, even vision problems have been reported, but under such circumstances you should contact the doctor right away and receive professional help. Nevertheless, it is a good idea to stay calm since anxiety adds up to the severity of the symptoms and that is surely the last thing you'd like to do. There is a whole range of symptoms, one nastier than the other that accompany the bite of a dangerous spider: digestive troubles such as nausea and vomiting, headaches and fever, not to mention the local discomfort manifested as pain and itchiness. 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.