American House Spider

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Spiders, Pacific Northwest

American House Spider, Pacific Northwest
American House Spider, Photo By Bud Logan

The American House Spider is a fairly common arachnid, that is likely to escape notice, as it tends to build its web in out-of-the-way places. Although they are called a house spider, most of the ones l’ve seen are outside, in our sheds or in the greenhouse. Their web behaviors are efficient, with little wasted motion, and as such, they easily go unnoticed.

There are several species of this genus in the Pacific Northwest, but all of their coloration is in shades of brown, making them hard to tell apart. They are also rather dull in appearance, making it easier to blend into the background.

They don’t bite people with any regularity, and their venom is not dangerous to humans. Their bodies are generally around 1 cm long. Many species of American house spider share a body shape & size similar to that of female widow spiders.  Black widow spiders, though, are glossy black, with a characteristic, red hourglass marking on their undersides.

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