WOLF sPIDERS (LYCOSA)
These spiders are fast moving nocturnal hunters that are often seen by people.
Wolf spiders sometimes wonder into buildings occupied by humans when they are looking for insects to prey on, however, they prefer living outside (where their habitats include areas underneath timber, stones, decks, and leaf litter). When they do stay in buildings, they often stay at floor level, hiding beneath furniture and along walls. They often come into homes on firewood.
Although these spiders will bite when provoked, they are generally shy in nature, and they usually come into human dwelling by accident. They are actually a beneficial species of spider, feeding on a variety of insects that are crop pests.
LONG-bODIED cELLAR sPIDERS (PHOLCUS PHALANGIOIDES)
Long-bodied cellar spiders produce loose and irregular webs that are often found in corners. Hanging upside down from the bottom of their webs, they will rather add new webbing than clean the current ones. This habit results in very extensive webbing.
These spiders are most commonly found in damp, dark spaces such as basements, cellars, garages, sheds, warehouses, barns, closets, ceilings, underneath sinks, as well as in other areas that are humid enough.
Although these spiders are mostly found in human dwellings, they are not particularly dangerous and do not pose a threat to humans, due to the fact that they are not venomous. There is a popular false urban legend stating they are the most venomous spiders that exist, but are unable to bite due to their tiny jaws.
JUMPING sPIDERS (SALTICIDAE)
Jumping spiders are ground dwellers that do not construct webs to catch their prey. They do, however, construct their hides out of webs. These hides are saclike, loosely woven and have two openings. Jumping spiders are diurnal (active during the day), preferring sunlight to darkness. They are excellent hunters with very good day vision and are able to detect prey up to 18" away. True to their name, they are excellent jumpers, but they are also able to move sideways, forwards and backwards.
These spiders do not pose a threat to human beings, since their venom is not poisonous to us.
HOUSE sPIDERS (ACHAEARANEA TEPIDARIORUM)
Due to its low number of insects and low humidity, house spiders struggle to survive in modern day homes. They prefer living outside, but can also live in areas such as sheds, garages, barns and warehouses that have an abundance of insects and a high humidity. These spider’s webs are not structured and they will readily abandon their webs and build another one in a more suitable place when food sources run out.
The habitats of these spiders include areas inside of closets, basements, underneath furniture and windowsills and the upper corners of rooms. When outdoors, they prefer lighted areas that attract insects.
Although these spiders can become an annoyance, they pose no threat to human health.
BROWN rECLUSE sPIDERS (LOXOSCELES RECLUSA)
Brown recluse spiders are mainly nocturnal and feed on other insects such as cockroaches and crickets. These spiders, especially the further wondering males, often crawl into shoes and clothing.
These spiders mainly live outdoors in wood piles and debris. They will only live indoors if the area is quiet, dark and undisturbed, such as in storage areas.
Brown recluse spiders are not known for biting humans, but they will bite humans if they are disturbed while hiding in clothing or shoes. The bites inflicted by these spiders are very painful and cause ulcerous sores.
BLACK wIDOW sPIDERS (LACTRODECTUS MACTANS)
These spiders prefer to make their webs close to the ground and will always build their nests in protected areas such as piles of firewood and boxes.
Black widow spiders are often found in piles of wood where they gain access to buildings when the wood is carried into a building. The habitats where these spiders reside include sheltered areas such as boxes and underneath windowsills.
These spiders have a venomous, neurotoxic bite that causes severe reactions (especially in the elderly and young children) and extreme pain. They do not, however, instinctively bite people, with most bites happening by accident.
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