Occasional invaders are as abundant as the stars in the sky and can flourish anywhere food, warmth and shelter are available. While most are not harmful or dangerous to humans, they can become a nuisance at the very least. Occasional invaders typically invade living spaces through unsealed cracks and crevices located around windows, doors, brick or loose siding.
Boxelder bugs are flattened, blackish and about 1/2 of an inch long with red to orange markings on their wings. In the fall, they congregate on the South and West sides of structures for warmth in the sun as they seek shelter for the winter months ahead. Boxelder bugs enter homes and businesses through voids around windows, doors, soffits and vents. In the spring they emerge and actively try to find their way back outdoors.
Centipedes and Millipedes
Centipedes and millipedes are not insects because they have more than six legs, but they are closely related arthropods. Both of these groups of pests have long, segmented bodies. Centipedes have one pair of legs on each segment, where as, millipedes have two pairs of legs on each segmented body part. They require a moist environment in which to live and are most active at night.
Clover mites are no larger than the size of a pinhead. They are red, oval shaped and have eight legs. Their front pair of legs are very long compared to their others and are often mistaken for antennae. These nuisance pests can be found crawling on siding, brick walls, window sills and other such surfaces. When crushed, they leave behind a red stain due to their pigmented bodies.
Cluster flies are slightly larger than the common house fly and they have a patch of yellowish, golden hairs under their wings. During late summer and early fall, large numbers of these flies "cluster" on the warm sides of buildings as they try to make their way into attics, wall voids, basements and other darkened sites to hibernate for the colder months. They become active again around mid spring when temperatures begin to rise, or sometimes even earlier if their overwintering hiding spaces become warm enough.
Crickets are closely related to grasshoppers and locusts. Like them, they have the hind legs which are modified for jumping. Crickets will accidentally
invade homes and businesses, but only rarely will they reproduce there. The usual point of entry is through open or poorly fitted doors and cracks in doors, windows, foundations or siding. These factors can contribute to cricket invasions and the damage they cause.
The most distinguishing physical feature of the earwig is the claw-like forceps located on its back end. They are reddish-brown and have a flattened, elongated body that measures about 5/8 of an inch long. The name, earwig, comes from an old, unfounded superstition that these insects entered the ears of a sleeping person and burrowed into the brain causing insanity.
The gnats you see in and around your home or business could be one of many different small flies. Some of the most common are fungus gnats, fruit flies and drain flies. Fungus gnats typically breed in soggy soil within potted plants. Fruit flies are drawn by ripening fruit and recycling bins. Drain flies begin in sewers and emerge through the drains into the home or business.
Pillbugs and Sowbugs
Pillbugs and sowbugs are similar looking land crustaceans that range in size from 1/4 to 1/2 of an inch long with seven pairs of legs and two pairs of antennae. They are dark to slate gray in color and have body segments resembling armored plates like that of an armadillo. Pillbugs have been given the nickname "rollie-pollies" due to their ability to roll up into a tight ball when disturbed since they lack tail-like appendages. Sowbugs possess two tail-like appendages making them incapable of rolling into a tight ball.
Ticks feed on the blood of vertebrate animals and can transmit diseases such as Lyme Disease. Ticks are very small, 1/50 to 1/8 of an inch long, and can be found on the tips of grasses and shrubs searching for host animals.