--- title: "How to Get Rid of Phorid Flies in Your House" description: "Learn how to get rid of phorid flies in your house. Find hidden breeding sources, clean drains, remove larvae, and prevent recurring infestations." canonical: https://ngpest.com/blog/phorid-flies-in-the-house-often-point-to-a-hidden-problem/ site: "Nextgen Pest Solutions" site_url: https://ngpest.com/ --- # How to Get Rid of Phorid Flies in Your House Michael Holden · August 5, 2026 ![Phorid flies shown by a close-up of a small fly with a humped back, long legs, and dark wings resting on weathered wood](https://ngpest.com/wp-content/uploads/2026/08/Phorid-Flies-Resting-Near-a-Hidden-Pest-Source.webp) Phorid flies often rest near the damp, decaying material where they breed, so spotting one can point to a hidden source. To get rid of phorid flies in your house, locate and eliminate the moist, decaying organic matter where they breed. Clean affected drains, remove food waste, repair leaks, and monitor adult fly activity. If phorid flies keep returning, a hidden breeding source inside a wall or beneath flooring may require professional inspection. ## **Key Takeaways** - **Find the source:** Phorid flies breed in moist, decaying organic material, including drain buildup, food waste, and animal remains. - **Eliminate breeding material:** Removing organic debris is more effective than trapping adult flies alone. - **Check hidden plumbing:** Recurring infestations can sometimes indicate damaged drains or concealed moisture. - **Identify the pest:** Phorid flies have a humpbacked appearance and run rapidly across surfaces. - **Prevent recurrence:** Repair leaks, maintain sanitation, and monitor previously affected areas. ## **How to Get Rid of Phorid Flies** The most effective way to eliminate phorid flies is to find their breeding source and remove the conditions supporting eggs and larvae. ### **Step 1: Find the Breeding Source** Inspect kitchen sinks, floor drains, garbage disposals, trash containers, and spaces beneath appliances. Look for organic residue, spoiled food, standing water, or persistent dampness. Place sticky traps near suspected areas to determine where flies are most active. You can also temporarily place a suitable monitoring trap over a suspected drain opening when it is safe to do so. However, flies gathering around a drain do not necessarily mean they are breeding inside it. ### **Step 2: Remove Decaying Organic Matter** Discard spoiled food, empty garbage containers, and scrub away accumulated residue. Clean behind appliances, beneath cabinets, and around pet feeding or waste areas. If contaminated material is accessible, remove it safely and clean the affected surfaces. Phorid fly larvae feed on decomposing material, so eliminating their food source helps interrupt reproduction. ### **Step 3: Clean Drains and Repair Leaks** If you suspect a drain, use a drain brush or suitable cleaning method to remove organic buildup from accessible pipe surfaces. An appropriate microbial drain cleaner may help break down remaining residue when used according to its label. Avoid relying on bleach or mixing drain chemicals, as these methods may not reach breeding material and can create chemical hazards. Repair leaking pipes, dripping fixtures, and damaged drainage connections. ### **Step 4: Trap Adult Flies and Monitor Activity** Place sticky traps near affected drains, windows, and utility spaces to monitor adult fly activity. Check whether fly numbers decrease after sanitation and moisture correction. If activity persists in one location, investigate for another breeding source. According to [NC State Extension](https://content.ces.ncsu.edu/phorid-flies), effective control depends on identifying and eliminating the areas where larvae develop. ![Phorid Flies](https://ngpest.com/_media/v1/2026/08/Phorid-Flies-1.webp) ## **What Are Phorid Flies?** Phorid flies are small insects belonging to the family Phoridae. Also called **scuttle flies**, **coffin flies**, or humpback flies, they are recognizable by their rounded thorax and rapid running behavior. These tiny phorid flies commonly appear around kitchens, bathrooms, drains, and other areas containing organic waste. ### **How to Identify Phorid Flies** Many common household phorid flies measure approximately 1/16 to 1/8 inch long, although size varies by species. Identifying characteristics include: - A distinctive humpbacked thorax. - Tan, brown, or dark-colored bodies. - Relatively long hind legs. - Rapid, irregular running across surfaces. - Short flights between resting areas. Unlike many other small flies, phorid flies frequently run before taking flight. ### **Phorid Flies vs. Fruit Flies and Drain Flies** Identifying the correct insect helps determine where to look for breeding sources. | **Feature** | **Phorid Flies** | **Fruit Flies** | **Drain Flies** | | --- | --- | --- | --- | | Appearance | Small, humpbacked body | Rounded body, often reddish eyes | Fuzzy body and broad wings | | Movement | Rapid running and short flights | Frequently hovers near food | Weak, short flights | | Breeding material | Moist, decaying organic matter | Fermenting food and liquids | Organic buildup in wet drains | | Common locations | Floors, counters, drains | Produce, trash, recycling | Bathrooms, floor drains | If flies gather around produce, read our guide on [how to get rid of fruit flies](https://ngpest.com/blog/how-to-get-rid-of-fruit-flies-the-ultimate-guide/). For other small flying pests, see our [guide to getting rid of gnats](https://ngpest.com/blog/how-to-get-rid-of-gnats/). ## **Where Do Phorid Flies Come From?** Phorid flies come from moist environments containing decomposing organic material. Females deposit eggs in suitable breeding sources, allowing larvae to develop before emerging as adults. When phorid flies appear in a house, the source may be visible or concealed behind appliances, inside drains, or beneath flooring. ### **Common Phorid Fly Breeding Sources** | **Source** | **Where to Inspect** | **Warning Signs** | | --- | --- | --- | | Drain buildup | Sinks, garbage disposals, floor drains | Repeated activity near drains | | Food waste | Trash bins, pantries, appliances | Flies near decaying food | | Pet waste | Litter boxes, waste storage | Activity around damp waste | | Appliance moisture | Refrigerator pans, utility equipment | Dampness and nearby flies | | Animal remains | Crawl spaces, attics, wall voids | Unusual odors or sudden fly activity | | Damaged plumbing | Beneath floors, sinks, walls | Moisture, odors, recurring flies | Inspect accessible breeding locations before assuming a concealed plumbing problem exists. ### **Can Phorid Flies Come From Walls or Plumbing?** Yes. Phorid flies in walls or near floor openings may originate from decaying organic material associated with hidden moisture or damaged plumbing. A leaking drain can release wastewater into surrounding material, creating conditions suitable for breeding. Adults may emerge through gaps around pipes, flooring, or baseboards. The [University of Maryland Extension](https://extension.umd.edu/resource/phorid-fly) notes that unusually large indoor populations can sometimes indicate damaged drainage or sewer lines. However, finding flies near a wall does not automatically confirm a plumbing defect. If cleaning accessible areas fails, professional inspection may be necessary. ## **Phorid Fly Life Cycle: Eggs, Larvae, and Adults** The phorid fly life cycle includes four stages: eggs, larvae, pupae, and adults. **Phorid fly eggs** are deposited in moist, decaying organic material. After hatching, phorid fly larvae feed on that material before developing into pupae and eventually adults. Under favorable conditions, some species complete development in approximately 10 days, although timing varies by temperature and species. Phorid flies do not build conventional nests. Instead, their breeding material provides food and shelter for developing larvae. This explains why adult traps cannot eliminate an infestation while eggs and larvae remain in concealed breeding sources. ![Phorid Flies](https://ngpest.com/_media/v1/2026/08/Phorid-Flies-2.webp) ## **Why Do Phorid Flies Keep Coming Back?** Phorid flies usually return because their breeding source remains active or another source has been overlooked. Common reasons include: - **Incomplete drain cleaning:** Organic buildup remains inside the plumbing. - **Hidden leaks:** Moisture continues accumulating beneath floors or behind walls. - **Overlooked waste:** Decaying food, pet waste, or animal remains remain concealed. - **Adult-only treatments:** Traps reduce visible flies without eliminating developing larvae. - **Multiple breeding sites:** Cleaning one source leaves another untreated. If flies continue appearing, compare trap activity between rooms and note where they gather. Persistent activity around drains, floor cracks, or plumbing fixtures may warrant a more detailed inspection. ## **How to Prevent Phorid Flies in Your House** Preventing phorid flies requires consistent sanitation and moisture control. Dispose of food waste promptly, clean garbage containers, and remove organic residue from affected areas. Maintain drains by cleaning accessible buildup when necessary. Keep appliances, utility areas, and cleaning equipment free from persistent moisture. Repair leaking pipes and inspect previously affected locations for recurring dampness. If an earlier infestation involved damaged plumbing, ensure the underlying problem has been corrected. ## **Get Professional Phorid Fly Control** If phorid flies keep returning after thorough cleaning and moisture correction, the breeding source may be concealed beneath flooring, inside walls, or around plumbing. Nextgen Pest Solutions provides professional [fly control services](https://ngpest.com/services/fly-control/) to help identify problem areas and recommend appropriate treatment. **Contact Nextgen Pest Solutions** to schedule an inspection and address persistent phorid fly activity at its source. Table of Contents - [Key Takeaways](#key-takeaways) - [How to Get Rid of Phorid Flies](#how-to-get-rid-of-phorid-flies) - [Step 1: Find the Breeding Source](#step-1-find-the-breeding-source) - [Step 2: Remove Decaying Organic Matter](#step-2-remove-decaying-organic-matter) - [Step 3: Clean Drains and Repair Leaks](#step-3-clean-drains-and-repair-leaks) - [Step 4: Trap Adult Flies and Monitor Activity](#step-4-trap-adult-flies-and-monitor-activity) - [What Are Phorid Flies?](#what-are-phorid-flies) - [How to Identify Phorid Flies](#how-to-identify-phorid-flies) - [Phorid Flies vs. Fruit Flies and Drain Flies](#phorid-flies-vs-fruit-flies-and-drain-flies) - [Where Do Phorid Flies Come From?](#where-do-phorid-flies-come-from) - [Common Phorid Fly Breeding Sources](#common-phorid-fly-breeding-sources) - [Can Phorid Flies Come From Walls or Plumbing?](#can-phorid-flies-come-from-walls-or-plumbing) - [Phorid Fly Life Cycle: Eggs, Larvae, and Adults](#phorid-fly-life-cycle-eggs-larvae-and-adults) - [Why Do Phorid Flies Keep Coming Back?](#why-do-phorid-flies-keep-coming-back) - [How to Prevent Phorid Flies in Your House](#how-to-prevent-phorid-flies-in-your-house) - [Get Professional Phorid Fly Control](#get-professional-phorid-fly-control) - [Start My Pest Control Plan](#start-my-pest-control-plan) - [Frequently Asked Questions About Phorid Flies in the House](#frequently-asked-questions-about-phorid-flies-in-the-house) Contributor ![Man with dark hair and beard wearing a light blue polo shirt against a gray background](https://ngpest.com/_media/v1/2025/11/Michael.webp) Michael Holden, CEO Nextgen Pest Solutions offers a wide range of pest control services. ## Start My Pest Control Plan Limited time: get $25 off your first service. Frequently asked questions ## Frequently Asked Questions About Phorid Flies in the House Get a free inspection when you book a pest control service. **How long do phorid flies live?** Adult phorid flies generally live several days to a few weeks, depending on their species and environmental conditions. **Where do phorid flies lay eggs?** Phorid flies lay eggs in moist, decaying organic material, including food waste, contaminated drains, animal remains, and suitable soil. House flies and blow flies also lay eggs on food. Here’s [how to spot fly eggs on food](https://ngpest.com/blog/fly-eggs-on-food/). **Can phorid flies come from walls?** Yes, phorid flies can emerge from wall voids when moisture and decomposing organic matter support their development. **Do phorid flies build nests?** No, phorid flies do not build conventional nests; they reproduce in suitable organic breeding material. **Can phorid flies return after drain cleaning?** Yes, flies may return if organic residue remains, moisture problems persist, or another breeding source has not been eliminated.