Drain Flies

Drain flies are also sometimes called sewer flies or filter flies. They are very small flies about 1/16” long with light bodies. The hold their leaf shaped wings roof like over their backs when at rest. Both the body and their wings are covered with long antennae with 13-15 bead-like segments. The larvae are aquatic and are long and cylindrical with the fore end of the body somewhat flattened on the lower side where eight suckers are found. They have dark, hardened patches on the back of each segment and they breathe through a hardened, stalk-like siphon tube at the end of the body.

Drain Fly Information


Adults are 1/8” long and dull yellow-brown to dark brown. Many species have distinctive red eyes, and the wings have two “breaks” in the leading edge nearest the body. The larvae are small (1/10 – 1/5 inch long) and very distinctive with an extended, stalk-like breathing tube at the rear of the body. The pupae are brown and seed-like with two horn-like stalks at one end.

Fruit Fly Information


Adult houseflies are approximately 1/8-1/4” long, females usually being larger than the males with wider set eyes. They are dark gray in colour with 2 velvety stripes, silver above and gold below. Their thorax has four narrow black stripes. House flies are general feeders, attracted to a wide variety of substances from excrement to human foods. These flies have been shown to harbour over 100 different kinds of disease causing pathogens, many of which are associated with filth. These include typhoid fever, cholera, diarrhea, dysentery, tuberculosis, anthrax, polio and others. They have shown to be disease pathogen transmitters via their vomit, feces, and contaminated external body parts.

House Fly Information


Adults are about 1/64-1/4” long with a humpbacked appearance in lateral view. Phorid flies can be yellowish, black or brown in colour. Short antenna, basal 2 segments very small, 3rd segment globular with a long bristle. Wings have strong, heavily pigmented veins in front area, remaining veins weak and without crossveins. Larvae up to 3/8”; spindle shaped with projections on rear segments to shorter, broader projections dorsally. Colour is whitish, yellowish white or grayish.

Phorid Fly Information


The adult cluster fly is 5/16”-1” long, slightly larger than a common house fly. It is gray in color with golden hairs on its thorax. When it lands on a surface, it folds its wings one on top of the other flat over its back. Cluster flies are slightly larger and darker than house flies and have a coating of short golden hair on their thorax. Cluster fly larvae look like typical maggots but are seldom seen because they spend their lives as parasites inside earthworms

Cluster Fly Information

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