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. Keep in mind the fact that these creatures will not attack unless they feel threatened, as a human is no prey for their match. The harm the spider venom can inflict depends on the fierceness with which the spider will defend itself. Furthermore, poisonous spiders are part of balanced ecosystems where they insure a living equilibrium among other species of insects. The bite of camel spiders represents no great threat to the general health condition, unless it gets infected. The only variety of venomous camel spiders grows in India, but research is pretty scarce in the field. Apparently, the Indian camel spiders can hunt down lizards by injecting them with venom and paralyzing their movements. Hence, the ability to correctly identify spider bites is vital for the right treatment of necrosis. 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. Spider Bites Though most people fear spider bites because of the nasty symptoms associated with them, sometimes there is nothing to worry about, as a small skin wound is no threat for one's health. Not all spider bites are dangerous, since the majority of spider species are totally harmless for humans; with the exception of a few venomous ones, the rest are pretty safe. The Harmless Domestic Spider The hobo spider, also known as the funnel web spider, the hobo spider is a harmless species that lives both in Europe and on the North American continent. The specificity of the hobo spider is related to the way it weaves its web: the funnel-shaped nest is the perfect structure to wait for prey in.