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. Quality photos or drawings as well as proper descriptions of the species are necessary when trying to distinguish between the various spiders that live so very close to us. This unjust pattern is not justified since even the most poisonous spiders will not attack a human unless they felt threatened. All spiders need to inject venom in order to survive, it is in the nature of their species and one of the life mechanisms they have been endowed with; what really differs from one species to another and gives rise to the classification into poisonous and non-poisonous is the amount of venom and its toxicity. All in all, spider identification serves not only to the scientist but to the average person who either takes a great interest in the various spider species or who'd like to avoid risky exposures and eventual bites. Protection measures need to be taken when working outside in areas where poisonous species live; thus, make sure you wear special gloves particularly if you spend some time around debris piles and wood piles for instance. As their very name suggests they enjoy very retreated corners where they are not bothered by light or intruders: cellars, garages, hallways or any other dark house area. Moreover, brown recluse spiders are very likely to be found behind paintings or under desks and tables. Brown recluse spiders are also very special by the way they have the eyes located on the body. The great thing about these creatures is that they have adapted to the harshest of environments from the desert and the tropics to the Arctic areas where they can live underwater. In terms of gender relationships, male spiders are famous for being killed right after intercourse, or at least this is the general myth people know. Once the venom has got into the system, there is a whole range of symptoms that accompany the brown recluse spider bite: vomiting, nausea, fever and muscular or joint pain have been among the most frequently reported. Though apparently harmless, the brown recluse spider bite is more serious than that of other more venomous and threatening species.