The mating period of trapdoor spiders coincides with the wet season when the males get out searching for a mate. Like with other spider species, the female sometimes eats the male, but the latter often escapes being eaten and manages to mate with several females before dying. The siblings will not appear for a few months after intercourse, and they will remain protected in the female's burrow until they are old enough to disperse on the ground. 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. All spiders depend on their venom for survival: venom is the way to hunt and defend themselves, but from the many thousands species only about two hundred actually represent a threat for human health. The special thing about these creatures is the way the females carry the egg sacs with them, and once the eggs hatch, the siblings remain attached to their mothers' back until they are large enough to detach and start a life on their own. Without being venomous, the wolf spider bite can cause a bit of trouble for more sensitive people. Hives, wheezing, shortness of breath and weakness are the general symptoms associated with anaphylaxis, therefore call 911 right away if you notice any such symptoms. Other systemic reactions to spider bites include leg cramps, leg numbness, headaches, pulse changes, exhaustion and more, they are all serious enough to determine one to call the doctor right away. Nevertheless, besides this self-treatment you should also seek professional medical health since brown recluse spider bites are not to be taken lightly. Other measures meant to improve the victim's condition include the elevation or the immobilization of the body part if the bite has been made on one of the limbs. In terms of toxicity, the black widow spider has one of the most potent venoms in the animal world: it is actually fifteen times stronger than that of the rattlesnake for instance. It also surpasses the cobra and the coral snake in the effectiveness of the poison. Though death is not usually the outcome of a black widow bite, some dozens of cases have been reported over the last decades only in the United States.