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In Washington state, there are only two spiders that can cause medical issues: black widow spiders and yellow sac spiders, according to the Washington State Department of Health.
Yellow Sac Spider. Yellow sac spiders are also more common in eastern Washington, but can still be found in the Seattle are. Yellow sac spiders can be yellow, white or green with darker legs and ...
It is a nesting woodland species commonly seen in the Pacific Northwest, and one of the most commonly found and widespread spiders in populated areas of Washington state. [2] It can often be found in households and other man-made structures with thin funnel webs, so long as the niche has not yet been filled by another organism.
Hobo spiders do not have two distinct longitudinal dark stripes on the top side of the cephalothorax, instead showing indistinct or diffused patterns. Washington spiders with distinct dark stripes include spiders from the genera Agelenopsis and Hololena and possibly some wolf spiders .
Antrodiaetidae, also known as folding trapdoor spiders or folding-door spiders, is a small spider family related to atypical tarantulas. They are found almost exclusively in the western and midwestern United States, from California to Washington and east to the Appalachian Mountains . [ 1 ]
The side effects of a black widow bite can include muscle cramps, headaches, profuse sweating and vomiting, according to Kansas State University Research and Extension. In rare cases, a bite can ...