American house spiders are also very common and harmless. They have a widow-like shape and are a light brown and gray color. Black widows are more common in eastern Washington, but small ...

What they look like: The brown recluse is a brown spider with a distinct “violin-shaped marking” on the top of its head and down its back, Potzler says. They also have six eyes instead of the ...

In the past couple decades, researchers have noticed black widow spiders (adult female shown at right) commonly being displaced by the brown widow (adult female at left), a fellow species in the ...