Trapdoor spiders may also have parallel bars on the abdomen, but this is not always the case, since diversity is at home even within the range of the same species. Trapdoor spiders are not that easy to identify since there are other similar species for which they are often mistaken: the funnel-web spiders and the mouse spiders are the most relevant examples here. 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. Funnel Web Spider The funnel web spider is normally found in the southern hemisphere, particularly Australia, both in coastal and highland areas. 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. Unlike the general opinion that associates spiders with webs, this is not the case with the huntsman spider: this species goes out to hunt its pray as it doesn't wait for it to get caught in a web. Tree bark, crevices and even garages and sheds are the favorite places where the huntsman spider would make its home. Unlike most of its brothers, the wolf spider prefers to remain on the ground where it hunts at night; there is no web and no sign that would let you know where you'll find a specimen since the wolf spider desperately tries to stay out of the humans' way. In some parts of the world it is mistaken for the brown recluse spider that is highly venomous, but for the knowledgeable eye the absence of the violin shape of the brown recluse species speaks for itself. Lots of doctors recommend a minor surgical intervention in the tissue area affected by the venom, yet the excision could impair the recovery as such and may increase the risk of scarring. The curious fact is that lots of brown recluse spider bites have been reported in parts of America where this species does not live.