Many people learn to identify spider specimens that live closest to their homes, in sheds and garages. Inevitably, you will get into contact with a spider sooner or later, either indoors or outdoors; the general tendency is to destroy their nests inside of our homes since we associate cob webs with a messy and unclean area. 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. People who live in geographical areas that represent the habitat of venomous species tend to learn how to recognize the dangerous specimens and thus avoid coming into contact with them. The treatment for special spider bites can only be provided in professional medical institutions since the risk the victim faces in most such cases is necrosis. Spiders Maybe they give the creeps to some of us, while others treasure them as pets: spiders are spread all over the world both in open nature and in our homes. There are thousands of species, some more venomous than others, to the point that they can kill a man in a matter of minutes. Despite their incredible diversity, all spiders create silk and design complex webs in which they catch their prey, nevertheless, silk is also great for climbing and laying eggs. Black Widow Spider The black widow spider is probably the most famous and feared spider species in the world, and all the scary picture comes from the habit of the female spider to devour the male after mating. It is this specificity that is actually responsible for the name of the species as such, but there are plenty of other features that make the black widow spider stand out. House species are the first to require proper spider identification since they are the first we come into contact with, and, on certain occasions, it is pretty difficulty to tell them apart. This is the case with the house spider, the giant house spider and the hobo spider; they all live indoors, but only the latter is a real threat to humans, since its bite can cause necrosis.