What are flies?

Flies are one of the most common pests found living worldwide. Only insects with one pair of wings belong to the order Diptera and are considered true flies. Flies can quickly become problematic for properties that provide them with the appropriate breeding sites near food and water sources that they need in order to thrive.

Flies have short lifespans but can reproduce quickly and maintain large populations. For example, the fruit fly lays more than 500 eggs at a time, with the entire life cycle (egg to adult) only taking a week. Below is a brief description of some of the most common fly species that become a problem inside homes and businesses:

drain fly

Drain Flies

Drain flies are quite small and their head and wings are covered in fine hairs; their hairy body and wings are why drain flies are also often called moth flies. When drain flies are at rest, the wings lay on their backs in a roof-like manner. These flies are weak fliers and make short hops when flying from place to place.

fruit flies

Fruit Flies

Fruit flies are another smaller species of fly with adults only growing to 1/8 of an inch long. These flies have tan or black bodies, translucent wings, feathery antennae, and large bright red or black eyes and are attracted to sweet or fermented liquids.



Gnats are tiny, long-legged insects with black or gray bodies and a unique Y-shaped pattern in their smokey colored wings. Many people think they look similar to mosquitoes. Gnats are weak fliers and are attracted to very moist soil.

house fly

House Flies

House flies are medium-sized flies. These flies have a dull gray bodies with four black vertical lines running down it. They also have one velvety gold and silver stripe on their face. The house fly's large red compound eyes provide them with excellent vision. They produce a loud buzzing sound that alerts people to their presence.

Are flies dangerous?

Yes, flies are considered dangerous. These pests pose many health risks, making them an unwelcome presence in any home or business. The biggest concern when it comes to flies is the pathogens, bacteria, and parasites they carry on their bodies and legs. Before finding their way inside, those flies have most likely been living in and crawling on less-than-sanitary things like garbage, decaying organic matter, animal waste, and carrion. House flies alone can transmit over 65 diseases, including salmonellosis and E. coli.

Why do I have a fly problem?

Flies can become a problem on any property that provides them with moist organic matter to eat and lay their eggs on. Once established in our yards, it's only a matter of time before they move inside, usually through torn screens, open doors, and gaps around window frames. Garbage, food left on counters, and excess moisture can all attract flies.

Where will I find flies?

No matter the species, flies can become a problem wherever there's food or moisture present. Flies are a significant pest found infesting homes, restaurants, schools, healthcare facilities, food processing plants, and anywhere else food is stored or prepared.

Fruit Flies — Fruit flies are most common during the late summer and fall (harvest season) when there are plenty of decaying fruits and vegetables to consume and lay eggs on. They often find a way into our homes after we purchase produce from the store already infested with fruit fly eggs or larvae. 

Drain Flies — Drain flies live mostly indoors. They lay eggs in the moist, decaying debris that builds up in sinks, tubs, and floor drains. They also become a problem behind walls and under floors near leaking water pipes. 

House Flies — House flies live outside, hanging around garbage cans, standing water, compost piles, pet excrement, and outdoor eating areas. But, as their name suggests, they also make themselves at home inside our houses. Inside, they are usually most problematic in kitchens, pantries, and wherever else there's food. 

Gnats — Gnats gather around and lay eggs in moist, nutrient-rich soil. Once the larvae hatch, they feed on plant roots and fungi in the soil. They also become a problem inside our homes behind walls where water damage is present. Other areas gnats gather include wet mulch, wet firewood, potted plants, overwatered garden, and leaky roofs. 

How do I get rid of flies?

Reach out to the White Knight Pest Control professionals to eliminate flies from your residential or commercial property. If the pests don't rest, neither will we! Our passion is serving others and keeping pests away from people and their property. At White Knight Pest Control, we eliminate flies and other pests through our annual pest control plans. Our guaranteed services help home, and business owners maintain pest-free properties. To protect your property from flies, contact us today!

How can I prevent flies in the future?

At White Knight Pest Control, we will help prevent problems with flies using our regular treatments. In conjunction with our comprehensive pest control services, the following prevention tips will help you keep flies out of your Texas, Utah, Arizona, or Colorado home!

  • Remove sources of food and breeding sites: Keep lids on trash cans and compost bins. Keep outdoor eating areas free of food debris. Store food in containers with airtight lids or the refrigerator. Pick up pet waste every day. Maintain gardens, picking up fruits and vegetables that fall to the ground. Keep drains free of debris.

  • Eliminate standing water: Repair leaky hoses and fixtures, and maintain gutters. Fix low lying areas in yards and driveways. Clean out clogged gutters and drains. Do not overwater gardens and potted plants.

  • Eliminate entry points: Seal spaces around doors and windows. Install screens in open windows and doors. Install covers on vents and drains. Keep doors and windows leading into your home closed as much as possible. Inspect fruits and vegetables for signs of flies before purchasing them.

  • Excellent sanitation: Vacuum floors, wipe down counters and tables daily to get rid of crumbs. Take the trash out daily. Regularly sanitize trash cans and recycling bins.


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