ARE SPIDERS HARMFUL?

Most spiders are beneficial. They feed on a variety of small insects including mosquitoes, moths, and other flies. Many species build intricate webs in strategic locations like windows, ceilings and corners. Since the webs are highly visible, most homeowners choose to remove them.

ARE THERE ANY POISONOUS SPIDERS IN WASHINGTON?

Virtually all spiders have venom and fangs, but only a few are likely to bite humans. The hobo spider is common throughout the state and is quite common in and around homes in western Washington. The black widow spider is common in eastern Washington but rarely found in western Washington. Contrary to popular belief, the brown recluse spider does not occur naturally in Washington.

WHAT DO HOBO SPIDERS LOOK LIKE?

These spiders are large with long hairy legs, and brown bodies about ¾” wide, including legs. They usually have whitish, parallel lines lengthwise on their backs. A less poisonous, larger relative – the giant house spider – is up to 2” across and also very common.

WHERE ARE HOBO SPIDERS FOUND?

They are commonly found in unfinished basements, garages, crawl spaces or around houses where heavy shrubbery grows against the house. They often wander long distances and are swift runners. These spiders build funnel shaped webs and can often be seen waiting for prey in the middle of the funnel.

WILL SPIDER BITES HURT ANYONE?

The initial bite of the hobo spider is like a very slight prick and is not painful, though reactions vary. In sensitive people, a hard area surrounded by a 2-6” wide reddened area may appear in less than ½ hour. The area later blisters and reveals a ½” to 1” lesion that may become infected. Bites may take months to heal and are often misdiagnosed as that of a brown recluse.

The bite may be accompanied by a severe headache which can last 2-7 days. Some victims also experience nausea, weakness, tiredness and vision impairment. If you experience any of these systems, you should consult a physician. Bites from these spiders rarely cause death, but the slow healing of the bite may leave a permanent scar.

WHAT CAN I DO TO KEEP THESE SPIDERS OUT OF MY HOME?

• Check doors and windows for gaps. Repair any holes or gaps large enough for spiders.
• Check firewood for silk egg sacs and spiders before bringing inside.
• Remove spiders and webs from dark corners with a vacuum cleaner. Empty the bag immediately.
• Don’t allow heavy shrubbery to grow against house.

If you have been experiencing spider problems, call us about our prevention programs. We'll treat problem areas with a recommended dose of an effective insecticide. We’ll also inspect your home to help you stop future invasions.

website by flashpoint design