Size: Ranging in size up to 5/8-inch long.

Appearance: Varies from black, brown and black, red and black, to light brown depending on the species. The most common species are black in color.

Size: About 2.5–4 mm long.

Appearance: Brown or Black. May have wings. A colony is composed of workers, alates, and a queen.

Size: Worker: 1/8- to 3/8-inch in length.

Soldier: Body is similar to that of the worker, but larger head with powerful mandibles.

Supplementary Reproductive: About one inch in length.

Primary Reproductive: About one inch in length.

Appearance: Worker: Pale, cream colored.

Soldier: Light colored with brown head. They have an elongated head with pincer-like mandibles.

Supplementary Reproductive: Light colored. They have either no wings or very short non-functional wings

Primary Reproductive: Dark brown/black. They have four wings of equal size until they are shed, and are commonly referred to as "swarmers."

Size: Workers of this species measure about 1/4-inch in length. Two closely related species are smaller. The winged females and males that swarm to start new colonies may measure up to 5/8-inch and 3/8-inch, respectively.

Appearance: Citronella ants and their relatives are golden yellow in color. The winged female swarmers are also golden yellow while the winged males are black.

Size: About 1/2-inch in length.

Appearance: Brown. It is recognized by the two dark, longitudinal stripes on the "shield" at the front of the body under which the head is located.

Size: Up to 2 inches long.

Appearance: Reddish brown. The American cockroach is the largest cockroach that infests buildings in the United States. This insect may be recognized by a yellow "figure-8" pattern on the shield at the front of its body. In Florida, the American cockroach is called the "palmetto bug," and it has the nickname "water bug" throughout the United States.

Size: Varies, though usually no larger than 1-1/2 inches in length.

Appearance: Generally black or brown.

Crickets are easily recognizable to most people and have enlarged back legs designed for jumping. Camel crickets range from tan to brown in color and are characterized by the severely humped thorax. They have very long rear legs and long, thin antennae.

Size: Larger rodents that may grow to a body length of 10 to 12 inches. Seldom will a rat weigh more than one pound.

Appearance: Can vary between gray, brown, and black. Norway rats, found throughout the U.S., have a heavier body, smaller eyes and ears, and a shorter tail. Rats are more prevalent in urban and rural areas, and are found in homes less often than mice because of their larger size.

Size: Body is up to 4 inches in length.

Appearance: This species has several closely related cousins that are colored similarly. All species are bicolored -- the top is light brown to red-brown and the feet and underbelly are pure white. The deer mouse has a tail that is covered with short, fine hairs.

Size: Small, its body rarely exceeding 3 inches long and one ounce in weight.

Appearance: Usually gray in color, but some may appear darker.

Mice are more numerous than rats and are more widespread throughout urban and suburban communities. A mouse can be distinguished from a young rat since the rat's head and feet will be overly large in relation to its body.

Size: Most found around buildings rarely measure longer than 2 inches. In Texas and the desert southwest, however, a couple of species can measure 6 inches or longer and may wander into homes and other buildings.

Appearance: Varies depending on the species. Most are brownish or orange-brown. The large Texas species has a bluish-black body, orange-red head and yellow legs.

Size: Small, elongated, triangular insects, usually between 1/2-inch and one inch in length.

Appearance: Typically a shiny gray or silver. They have three characteristic long, thin appendages extending from the rear of the abdomen.

Size: Generally small, about two inches or less in length. Some forest species in the southeastern United States may grow to four or more inches.

Appearance: Brown or black.

Size: Usually about 1/4-inch in length and round in shape.

Appearance: Many colors, but wings are usually red or orange.

The number of spots present will vary or the wings may have no spots at all.

Size: About one inch long.

Appearance: Dark brown. This insect can be recognized by the forceps extending from the rear of its abdomen. On males, the forceps can be quite large and ornate.

Size: About 3/8 inch (10mm) long at rest wing spread is about 5/8 inch (14mm).

Appearance: The have two tone bronze or brown colored wings. The larva (caterpillars) will have a brown head with a white to a yellow color body.

When at rest the wings are folded together along the line of the body. The front half of the forewings is a grayish-white color, and the lower half is a rusty red-brown color.