Cockroaches are insects of the order Blattaria or Blattodea, of which about 30 species out of 4,500 total are associated with human habitats. About four species are well known as pests.
Cockroaches can enter your home in many different ways, from the outside through cracks and crevices, vents, sewer and drain pipes. We even bring them in on products like grocery bags, boxes, purses and on our person!
Because cockroaches typically are nocturnal, if you’ve seen one, you probably haven’t seen them all. The few cockroaches you see by day could mean they were likely forced out by overcrowding; a possible sign of severe infestation.

American cockroaches are reddish brown and have a yellowish margin on the body region behind the head. They are usually around 1 and 1/2 inches long. When disturbed, may run rapidly and adults may fly. Immature cockroaches resemble adults except that they are wingless. American cockroaches generally live in moist areas, but can survive in dry areas if they have access to water. They prefer warm temperatures around 84 degrees Fahrenheit and do not tolerate cold temperatures.
In residential areas, these cockroaches live in basements and sewers, and may move outdoors into yards during warm weather. These cockroaches are common in basements, crawl spaces, cracks and crevices of porches, foundations, and walkways adjacent to buildings. They feed on a wide variety of plant and animal material.

Adult German cockroaches are light brown except for the shield behind the head marked with two dark stripes, which run lengthwise on the body, and about 5/8 inch long.
Egg capsules are light tan. German cockroaches, are the most common roaches found in houses and restaurants. They eat food of all kinds and may hitchhike into the house on egg cartons, soft drink cartons, sacks of potatoes or onions, used furniture, beer cases, etc.
They can develop into large populations and live throughout the house, especially in the kitchen and bathroom.When seen during the day in clusters, the population is large.Roaches can foul food, damage wallpaper and books, eat glue from furniture, and produce an unpleasant odor. Some homeowners are allergic to roaches. The pests can contaminate food with certain bacterial diseases that result in food poisoning, dysentery, or diarrhea.

The Oriental cockroach known as the “water bug,” is more closely associated with damp areas than the other common roaches.Adult Oriental cockroaches are shiny, dark brown or black, about 1 to 1-1/4-inch long and have nonfunctional wings incapable of flight.
These insects feed on garbage and decaying organic matter and are often considered the filthiest of the house-infesting roaches. They are found in damp basements, cellars, crawl spaces, near drains, leaky water pipes and beneath refrigerators, sinks and washing machines, under floors, and inside walls. They forage mostly on first floors of buildings. Outdoors, they are found beneath decomposing leaves or stones in mulching materials, in trash and at municipal sewer plants. During the autumn, there can be a mass movement into buildings, but because of their preference for cooler temperatures, can be found outdoors and in unheated buildings during the winter.
The adults are rather small cockroaches about 5/8 inch long. The adult male is slender in appearance with its wings extending beyond the tip of the abdomen. Adult females have shorter wings that expose a considerable portion of their broad abdomens. They have two light yellow or cream-colored bands across their backs. These bands tend to be hidden by the wings in the adults.

The markings of the brown-banded cockroach are roughly crosswise while those of the German cockroach are lengthwise. Brown-banded cockroaches are generally found on ceilings, high on walls, behind picture frames, and near motors of refrigerators and other appliances. They are also found in light switches, closets and furniture. They do not require as much moisture as the German cockroach which explains why they normally are found in rooms other than the kitchen or bathroom. These cockroaches dislike light and are not normally seen during the day.