Common House Spiders
House spiders occur throughout the world and have derived their name from their presence inside human dwellings. A number of species are classified as house spiders, although the common house spider is the most recognized. These arachnids are also sometimes referred to as American house spiders.
Female common house spiders measure between five and eight millimeters in length, while males measure only four millimeters. Common house spiders are typically brown or gray in color, with darker chevron markings along their bodies.
The presence of common house spiders is typically characterized by the formation of cobwebs. These silken thread structures can be found throughout infested homes. This abundance of empty webs is caused by the common house spider's propensity to spin webs in various locations until it finds the most suitable place to catch prey.
Webs are designed as trapping mechanisms and are funnel-shaped, with the narrow end acting as a den for the arachnid. Any contact made with the web produces vibrations throughout the strand, signaling to the common house spider that prey is present. Although common house spiders feed primarily on insects, they may also consume larger spiders, scorpions, rodents and small reptiles.
Mature common house spiders live for approximately one year, during which time females are capable of generating up to 3,000 eggs. Unlike some spider species, male and female common house spiders may choose to cohabitate and mate numerous times.
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