The Oriental Cockroach is dark brown to shiny black. They are usually about 1 ¼ inches long, but can sometimes grow bigger. The female Oriental cockroach has a somewhat different appearance from the male, appearing to be wingless at casual glance but has two very short and useless wings just below her head. They are often called “water bugs” since they prefer dark, moist places. Oriental cockroaches can be elusive in that a casual inspection of an infested dwelling during the day may show no signs of roach activity.
The German Cockroaches is medium brown and about ½ inch long .They have two dark longitudinal stripes directly behind the head. German Cockroaches can fly a little, but not for long distances. They come out mostly at night, and try to hide when lights go on. They are sensitive to cold and can die out in northern winters.
The Brown Banded Cockroach is tan to light brown and have two light-colored bands across the wings and abdomen, they may sometimes seem to be broken or irregular but are quite noticeable. The bands may be partly obscured by the wings. The male appears more slender than the female. Adult males can fly but females cannot. They need less moisture than other cockroaches and can be found more often in living rooms or bedrooms.
American Cockroach adults grow to an average length of around 1.6″ and about 0.28″ tall. They are reddish-brown and have a yellowish margin on the body region behind the head. Immature cockroaches resemble adults except they are wingless. This insect can travel quickly, often darting out of sight when someone enters a room, and can fit into small cracks and under doors despite its large size. It is considered one of the fastest running insects. Cockroaches can pick up disease-causing bacteria, such as Salmonella, on their legs and later deposit them on foods and cause food infections or poisoning. House dust containing cockroach feces and body parts can trigger allergic reactions and asthma in certain people.