It's Winter, Where Did These Flies Come From?

Remember seeing a big, slow moving fly in thevacuuming them up. Squashing them can leave an
window on a sunny winter day in January andunpleasant musty odor (that's why they call them
thinking, "Where the heck did that come from?" Wellstink bugs) and/or leave a stain on your wall,
even though they look like a common house fly,window, or drapes.
these are indeed Cluster Flies, and they can be a realIn the case of Cluster Flies, especially if the
nuisance to homes, hotels, and many office buildings,infestation is mainly on the top floor, incandescent
especially if there is a wooded area near by.light traps with glue boards placed in attics and crawl
Cluster Flies breed and spend most of their time inspaces can often catch them before they filter down
the woods, migrating to buildings in the fall, lookingin to your building. Ask your pest management
for a warm place for the winter. You can often seeprofessional about these.
them on the sunny side of a building on cool days inAn even better approach is to have your pest
the fall. They are attracted to the siding as the sunmanagement company treat the outside of your
warms it up. Then they will climb the wall looking forbuilding in the late summer or early fall every year,
an entry. Most times they find them at the roofespecially if your problem involves Lady Bugs or Stink
eaves or under windows. They then hide in attics andBugs. This way they march through the material and
crawl spaces and filter down in to the building overdie before they can become a problem on the inside.
the winter months, so the top floor is usually theIf your home or business has a log construction, your
hardest hit.problem is complicated because, with no attic or
Cluster flies are usually larger than a common housecrawl space, these pests come directly in to your
fly. They fly very slow and are so lethargic; one canliving space.
almost touch them before they will fly slowly away.As with any pest problem, one should consult a
Lady Bugs and "stink bugs"(a/k/a Western Coniferprofessional. Home remedies can often exacerbate a
Seed Bugs) will all enter the same way, and you mayproblem by driving pests deeper in to the walls, only
see them wintering in your facility as well. Theseto have them reappear at a later date and in greater
pests don't pose any real health threat. They arenumbers. This makes a professionals job more
more of a nuisance, although your hotel anddifficult, and thus, more expensive for the consumer.
restaurant guests will complain about them, andMany over the counter pesticides can be many times
nobody in the hospitality industry wants to leave amore toxic than what a professional would use,
negative impression with their guests.making the remedy much more of a health hazard
In very light infestations, it's just a matter ofthan the original problem.