This is a peculiarity of the species, completely different from that of other widow spiders. The surface of the sac is full of pointed projections that make it resemble to a fluffy little ball. In case you notice such a white globe sticking out from a hidden corner, then you can be sure you've come across a brown widow spider nest. 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. Nevertheless, this is not a general rule as in most cases, both males and females survive the encounter. Well adapted to various living conditions spiders use great camouflages, and they even imitate other species for survival. Most species have six or eight eyes disposed in various groupings on the body. The life extent of the hobo spider is pretty reduced, but though this species lives for a short period of time, their existence is pretty intense. Every year around August and September the hobo spider males are incredibly active, and it is during this time of the year that most bites are reported. The shape of the web woven by the hobo spider is truly unique, it consists of a very dense silk sheet which is usually curved upwards so that insects that come from above the structure may fall into it. The important thing about spider identification is to actually be able to tell the poisonous spiders from the non-poisonous ones. Fortunately, the latter are far more numerous than the former, as poisonous spiders are spread only in certain globe areas, and sometimes they have warning features that sets them apart. Brown Recluse Spider Belonging to a small-sized arachnid species, the brown recluse spider is the one to be found in shady corners both indoors and outdoors. Unlike most other spiders that grow in our homes, the brown recluse spider does not weave a web, but creates an apparently disordered thread shelter.