How To Identify A Spider Infestation.
Appearance - Common house spiders in the Seattle area range between 5-8 mm in length, and are usually brown or gray with stripes along their bodies. These arachnids possess several common attributes including their eight legs and two distinct body regions, instead of three like an insect has. These regions are called the cephalothorax – which contains the eyes, mouthparts, and legs, and the abdomen.
Behavior - Spiders are known for their unusual reproductive behaviors; the female house spider can lay as many as 250 eggs into a sac of silk. During their lifetime, they can produce more than 4,000 eggs. If you see spiders in your house, cobwebs or have gotten bitten, you probably have an infestation. Spiders usually only bite when they feel threatened; however, if they become crushed by a human for any reason they may bite.