House Spider is a broad term that covers a large variety of spiders . There is one House Spider more common than the rest in Las Vegas, The Hobo Spider (Eratigena agrestis). They find themselves cozy in homes all over Clark County. Hobo Spiders are often referred to as "Funnel Web Spiders", but that is often because people confuse Hobo Spiders with Australian Funnel-Web spiders.
Like many spiders the Hobo Spider varies greatly in appearance, making identification rather difficult. However that does not mean it's impossible, Hobo Spiders abdomen has V shaped pattern down the body, with the point facing the head. Hobo Spiders lack colored bands commonly found on spiders in the same family, while having a light stripe going down their sternum.
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The Hobo Spider originated in and was distributed from Europe to Central Asia, Western North America, and strangely enough, a small island in Denmark, Peberholm.
Hobo Spiders will live about 3 years, but only about a year in coastal areas. They mate and lay eggs in September, with the eggs hatching in the spring. After mating the males die, the females may also die but most are believed to live over the winter possibly to protect their eggs.
The Hobo Spider is known as an aggressive spider, they do generally avoid areas with major threats such as metropolitan areas or inside homes where Giant House Spiders may live. This does not mean they wont make the first move is someone or something stumbles into what they believe is their territory.
Like other Spiders in the Las Vegas and Clark County areas the Hobo Spider is nocturnal and will avoid well lit areas. Hobo Spiders are most likely to be found in your home from around the first or second week of July to about the time of the first major temperature drop or frost in your area.
Hobo Spiders prefer low light areas such as woodpiles, under decks or building foundations, rocks, and even the flower beds right outside your front door. They like to lie and wait at the end of their funnel shaped webs and wait for insects to get stuck in the web or walk right into the Hobo Spider.
Though once thought to be venomous, the CDC no longer includes the Hobo Spider on its list of spiders that pose a medical risk to humans. That being said with the Hobo Spiders known aggressive tendencies when threatened it is recommended to seek professional help when dealing with an infestation of Hobo Spiders.