Drain Fly Identification Guide

What are drain flies?

The drain fly is a small species of fly and is sometimes confused with small moths because of their appearance. Their body is black or gray, and their wings covered in fuzzy hairs. When at rest, the wings of the drain fly fold over their body in a roof-like manner. In addition to their fuzzy wings, drain flies have an erratic flight pattern, which helps to identify them. Drain flies are weak fliers and are only able to fly short distances. 

drain fly on white wall

Are drain flies dangerous?

Drain flies flying and gathering around drains are a big annoyance for either home or business owners. Drain flies don’t pose direct risks to people. The biggest problem with drain flies is they breed quickly and in the right conditions create large populations that are difficult to control. Drain flies that become squished leave behind black powdery marks on walls and other surfaces.

Why do I have a drain fly problem?

Drain flies are attracted to areas of standing water as they like to lay their eggs on the film that builds-up on the top of standing water. Clogged drains, leaky pipes, and other water issues will create areas of standing water and attract drain flies to a property. 

Where will I find drain flies?

Drain flies are most problematic around drains where moist organic debris collects. They gather in drains located in kitchens, basements, bathrooms, and sewer areas. The female flies lay their eggs in moist debris, and once the larvae hatch, they feed on that same debris. Drain flies can also become problematic behind wall spaces, inside of crawl spaces, or behind refrigerators where leaky pipes or other moisture issues are present. 

How do I get rid of drain flies?

Acquiring help from a professional pest control expert is the best way to eliminate drain flies and keep them from returning. At Albemarle Termite & Pest Control, our technicians are highly trained and dedicated to providing safe and effective pest control services that are affordable. We are a local, family-owned pest control company whose number one priority is putting our customers first and exceeding expectations. 
For home or business owners looking to eliminate pests from their property once and for all, call Albemarle Termite & Pest Control today!

How can I prevent drain flies in the future?

To help protect your North Carolina property from drain flies, consider putting into place the following prevention measures.

  • In your home, repair leaky pipes, faucets, or fixtures.

  • Keep tub and sink drains free of debris. 

  • Use dehumidifiers to control moisture levels in your home.

  • Ventilate crawl spaces to prevent excess moisture.

  • Place weatherstripping around windows and doors.

  • ake sure door and window screens are intact. 


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