Common House Spider (Family: Theridiidae, Genus: Achaearanea) - Wiki
Common house spider
From Wikipedia, the free encyclopedia
Genus: Achaearanea (Strand, 1929)
Diversity: 148 species
Type Species: Achaearanea tepidariorum
[Photo] Common house spider (Achaearanea tepidariorum) and egg sac. Photo by Patrick Edwin Moran (http://en.wikipedia.org/wiki/User:Patrick0Moran). North Carolina, USA. Date 21 October 2003.
|Copyright (C) 2003 Patrick Edwin Moran|
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The Common house spider
, sometimes called the American house spider
, is an extremely common spider
in North America and South America, as its name suggests. There are several species of this genus, Achaearanea
, sharing many common features. They build their tangled web in secluded locations, which can also house eggs contained in one or more spherical sacs. Their behavior on webs is quiet and efficient. They are generally dull in appearance, with patterns consisting of brown shades for coloration. Their average body size is a quarter-inch long. These traits combined allow the spider
s to blend into the background and escape notice.
s are not aggressive. They are not known to bite people frequently, nor is their venom known to be dangerous to human beings. When removed from their webs their poor vision renders them helpless. Their only concern seems to be to find and return to their own web or build another one. They do not wander around inside houses except to find a secure place to build a web. Since these spider
s are harmless and their diet consists of pests such as flies and mosquito
, tolerating their presence in human homes is beneficial.
Many species of Common house spider
share a body shape and size that makes them similar to widow spider
s, which have venom that is classified as very dangerous.
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