H
Species Profile

Housefly

Musca domestica

Small fly, big public-health impact.
IamBijayaKumar/Shutterstock.com

Housefly Distribution

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Invasive Species
Origin Location

This map shows the native origin of the Housefly. As a cosmopolitan species, they are now found worldwide.

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housefly on green leaf

At a Glance

Found Worldwide
Also Known As Domestic fly, Filth fly, Common fly, Kitchen fly, Synanthropic fly
Activity Diurnal+
Lifespan 28 years
Weight 2.0E-5 lbs
Status Not Evaluated
Did You Know?

Adult body length typically ~6-8 mm; females are often slightly larger than males (species average varies by population).

Scientific Classification

The housefly (Musca domestica) is a cosmopolitan muscid fly closely associated with human habitation. It develops in decaying organic matter (especially manure and garbage) and is known for mechanically transmitting pathogens by contaminating surfaces and food.

Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Diptera
Family
Muscidae
Genus
Musca
Species
domestica

Distinguishing Features

  • Medium-sized gray fly (~6–7 mm) with four dark longitudinal stripes on the thorax
  • Sponging/lapping mouthparts (non-biting)
  • Large reddish compound eyes; clear wings; common on food and waste surfaces
  • Larvae are pale, legless maggots developing in decaying organic matter

Did You Know?

Adult body length typically ~6-8 mm; females are often slightly larger than males (species average varies by population).

A female can lay ~75-150 eggs per batch and commonly produces ~4-6 batches in her lifetime (often totaling ~300-900+ eggs).

Eggs are about ~1.0-1.2 mm long and can hatch in ~8-20 hours under warm conditions (development slows greatly when cooler).

At warm temperatures (around 30-35 °C), the full egg→adult cycle can be as short as ~7-10 days; in cooler weather it may take several weeks (or longer).

Housefly wingbeat frequency is roughly ~190-220 beats/second, helping power quick takeoffs and agile flight.

They "taste" with their feet: chemoreceptors on the tarsi detect sugars and other chemicals when they walk on food.

They can carry a large diversity of microbes; studies and reviews commonly report that 100+ human/animal pathogens have been associated with Musca domestica via mechanical transfer.

Unique Adaptations

  • Adhesive foot pads (pulvilli) with microscopic hairs (tenent setae) plus a thin secreted fluid enable walking on smooth surfaces and ceilings.
  • Halteres (modified hindwings) act as gyroscopic sensors, stabilizing flight during rapid turns and takeoff.
  • Fast visual processing: compound eyes and high flicker-fusion rates help them react to movement quickly (a key reason they're hard to swat).
  • Aristate antennae tuned for odor plumes: highly responsive to volatile cues from manure, garbage, and food, aiding location of breeding and feeding sites.
  • Rapid, heat-accelerated development: short generation times in warm conditions allow explosive population growth around suitable substrates.
  • Egg-larva-pupa-adult metamorphosis optimized for ephemeral resources: larvae (maggots) quickly exploit nutrient-rich, decaying organic matter before it dries or is removed.

Interesting Behaviors

  • Synanthropy (human-association): adults commonly rest indoors on walls/ceilings and outdoors on garbage, manure, and animal facilities, moving repeatedly between filth and food areas.
  • Mechanical pathogen transfer: microbes can be moved on leg hairs, body surfaces, sticky foot pads, and via regurgitation/fecal spots left on surfaces after feeding.
  • Sponging/lapping feeding: they cannot bite; they liquefy many solid foods by regurgitating saliva and then sponge the liquid with the labellum (mouth "pads").
  • Relentless grooming: frequent leg and body grooming helps keep sensory organs functional but also redistributes surface material-including microbes-across the body.
  • Strong site fidelity: adults often return to favored resting sites (warm, sunlit walls; edges; ceilings), especially between feeding bouts.
  • Daily rhythm: activity peaks in warm daylight; at night they tend to rest in sheltered sites (indoors, vegetation, animal housing).

Cultural Significance

Musca domestica, the common housefly, is a worldwide nuisance tied to people, animals, and sanitation. Once called the "typhoid fly," it spurred screens and waste control, shows filth and disease, and is used to teach metamorphosis and hygiene.

Myths & Legends

An Islamic hadith says a fly that falls into a drink has 'disease' on one wing and 'cure' on the other. This story, in books like Sahih al-Bukhari, affects how people see flies and contamination.

“Lord of the Flies” links houseflies to Baal-Zebub, a Philistine god's name later used for demons in Abrahamic religions; flies often stand for decay, filth, and evil or unclean places.

European folk belief and household superstition in various regions treated persistent indoor flies as omens-sometimes of sickness or bad news-reflecting their real-world association with unsanitary conditions.

In the Bible and ancient Near East, stories of fly plagues became a sign of god's punishment and decay; houseflies (Musca domestica) are often shown as the classic 'plague fly' in later tales and art.

The phrase "a fly in the ointment" (from Ecclesiastes 10:1) became a widely used proverb: a small contaminant spoils something valuable-an idea strongly reinforced by the housefly's habit of fouling food and surfaces.

Conservation Status

NE Not Evaluated

Has not yet been evaluated against the criteria.

Population Stable

Life Cycle

Birth 100 maggots
Lifespan 28 years

Lifespan

In the Wild
15–60 years
In Captivity
21–90 years

Reproduction

Mating System Polygynandry
Social Structure Aggregation Group
Breeding Pattern Transient
Fertilization Internal Fertilization
Birth Type Internal_fertilization

Behavior & Ecology

Social Aggregation Group: 100
Activity Diurnal, Crepuscular
Diet Detritivore Sugar-rich liquids (e.g., honeydew/nectar and other sugars), with protein-rich decomposing substrates used especially by females for egg production.
Seasonal Hibernates

Temperament

Opportunistic and strongly synanthropic (tracks human/animal resources)
Gregarious at resources but not cooperative; interactions mainly competitive (jostling/displacement)
Highly exploratory/rapidly habituates to some repeated stimuli yet readily startles and flees sudden air movements
Males persistently pursue females; sexual harassment can occur at high densities near food/oviposition sites (West 1951; Scott et al. 2014)

Communication

flight/wingbeat 'buzz' A byproduct of wingbeats; used as a close-range acoustic cue during pursuit/courtship - short-range rather than long-distance signaling
sex pheromone: females produce Z)-9-tricosene ('muscalure') that attracts/stimulates males at close range; used in commercial lures (Carlson et al. 1971; Rogoff et al. 1964
contact chemoreception via tarsi and proboscis Gustatory hairs) to evaluate sugars, salts, and other chemicals on surfaces - critical for choosing feeding/oviposition substrates (Dethier 1976; Chapman 2013
visual cues: motion/contrast and polarized/light intensity guide landing, orientation, and mate pursuit; males track females visually at close range Land & Collett 1974; Scott et al. 2014
mechanosensory cues: air-flow and substrate vibration sensed by antennae/body hairs mediate startle/escape and spacing in aggregations Chapman 2013

Habitat

Biomes:
Tropical Rainforest Tropical Dry Forest Savanna Desert Hot Desert Cold Mediterranean Temperate Grassland Temperate Forest Temperate Rainforest Boreal Forest (Taiga) Tundra Alpine +6
Terrain:
Plains Valley Coastal Island
Elevation: Up to 10498 ft 8 in

Ecological Role

Synanthropic detritivore/decomposer; major mechanical vector of microbes due to frequent movement between feces/decaying substrates and human food/contact surfaces.

Accelerates decomposition of moist organic wastes (manure/garbage) Contributes to nutrient mineralization and recycling in decomposer food webs Serves as prey for insectivores (birds, spiders, predatory insects), transferring nutrients up the food chain Disperses microbes among substrates (ecologically significant; in human settings this also underlies pathogen transmission risk)

Diet Details

Other Foods:
Moist decaying organic matter Animal manure Human and animal feces Food waste Rotting fruits, vegetables and fermented plant juices Sugar-rich liquids Carrion fluids and decomposing animal matter Animal secretions and moist films on surfaces +2

Human Interaction

Domestication Status

Wild

Musca domestica (housefly) is not domesticated. It is a wild, strongly synanthropic species that spread worldwide with people, farms, livestock, manure, and waste. It breeds in decaying organic matter (manure, garbage) and thrives in human-made places, often moving between filth and food, which can contaminate food and be a nuisance.

Danger Level

High
  • Mechanical transmission of enteric bacteria by contaminating food/surfaces after contact with feces/manure/garbage (classic associations include Salmonella spp., Shigella spp., pathogenic Escherichia coli, and other diarrheal agents; summarized in medical entomology texts such as Greenberg, 1971 and later reviews)
  • Mechanical carriage of helminth eggs and protozoan cysts from fecal sources to human-contact surfaces/food (reported in public-health entomology literature)
  • Food safety risk amplification in markets, kitchens, animal facilities due to frequent regurgitation/defecation while feeding ("fly specks") and high-contact walking on surfaces (West, 1951)
  • Allergic/asthma relevance in some settings via indoor nuisance exposure and particulate contamination (reported in environmental health literature)
  • Rare opportunistic myiasis (exceptional cases; not a typical obligate myiasis species but can be involved under unusual conditions)

As a Pet

Not Suitable as Pet

Legality: Housefly (Musca domestica) is usually not seen as a pet, but local health or pest transport rules may limit keeping, moving, or shipping live flies (permits or bans; do not release).

Care Level: Easy

Purchase Cost: Up to $10
Lifetime Cost: $5 - $50

Economic Value

Uses:
Public-health and sanitation pest (negative economic impact) Food contamination and spoilage risk (negative) Livestock facility nuisance and biosecurity issue (negative) Research/teaching organism (positive) Waste bioconversion and animal-feed ingredient via larvae (positive, where intentionally reared) Forensic/decomposition studies support (positive)
Products:
  • Costs of fly control: insecticides, baits, traps, manure/waste management infrastructure
  • Laboratory use: insect physiology, behavior, toxicology, pathogen-transfer studies
  • Larval biomass (maggots) used as feed ingredient (e.g., poultry/fish) where permitted and produced under biosecure conditions
  • Fish bait (maggots) in some contexts

Relationships

Predators 11

Common house spider
Common house spider Parasteatoda tepidariorum
American house spider
American house spider Parasteatoda tepidariorum
European garden spider Araneus diadematus
Green darner Anax junius
Barn swallow
Barn swallow Hirundo rustica
Little brown bat
Little brown bat Myotis lucifugus
American toad
American toad Anaxyrus americanus
Common wall lizard Podarcis muralis
Rove beetles
Rove beetles Staphylinidae
Parasitoid wasp Muscidifurax raptor
Parasitoid wasp Spalangia cameroni

Related Species 6

Face fly Musca autumnalis Shared Genus
Bazaar fly Musca sorbens Shared Genus
Australian bush fly Musca vetustissima Shared Genus
Stable fly Stomoxys calcitrans Shared Family
Horn fly Haematobia irritans Shared Family
False stable fly Muscina stabulans Shared Family

Ecological Equivalents 4

Animals that fill a similar ecological role in their ecosystem

Lesser house fly Fannia canicularis No ecological relationship explanation provided.
Stable fly Stomoxys calcitrans Occurs near livestock and manure where larvae develop. Both are common in human-made environments. The stable fly has piercing mouthparts and feeds on blood, whereas the housefly has sponging mouthparts and feeds on liquids. Both can carry pathogens.
False stable fly Muscina stabulans Often shares breeding substrates—manure, garbage, and decaying organic matter—and synanthropic settings such as barns, stables, and refuse sites. Has a similar life history to other muscids that frequent animal housing and can contribute to filth-fly complexes that contaminate feed and surfaces.
Bluebottle fly Calliphora vicina Occupies a similar filth-fly niche: adults visit garbage, feces, carrion, and homes and can spread microbes. Larval habitats differ: Calliphora vicina larvae develop in carrion (used in forensics), whereas Musca domestica larvae develop in manure and wet decaying matter.
The housefly (Musca domestica) is a common flying insect known for its small size, iridescent body, and ability to spread disease-causing pathogens.
The housefly (Musca domestica) is a common flying insect known for its small size, iridescent body, and ability to spread disease-causing pathogens.

“Houseflies can walk upside down.”

Up there with the cockroach, the housefly is one of the world’s most annoying insects. Nearly 90 percent of all species invading our habitats are houseflies. They survive on a diet of decomposing garbage and organic waste. Flies are one of the filthiest creatures on the planet, carrying millions of disease-infested microorganisms over their lifespan.

5 Incredible Housefly Facts!

What Do House Flies Eat - House Flies Sucking Mango Juice
  • The insect tastes with its limbs. They have chemonsensilla (taste receptors) on the lower legs and feet. Landing on a potential meal, whether a sandwich on your kitchen counter or animal feces in the street, the fly wanders on the surface so that their limbs get a taste. Satisfied, the housefly gladly consumes its meal.
  • The insect is capable of spreading a wide array of diseases. That’s due to breeding and feeding habits that bring them in contact with a broad range of bacteria over their life cycle, including E.coli, and Salmonella, as well as skin and eye infections and diarrhoeal diseases. The housefly spreads these threats through contamination of everything they come in contact with, including cooking utensils, food, and skin.
  • The bugs have a morphology that lets them climb and walk on any surface vertically, horizontally, or upside down. Each foot has a pair of pads (called pulvilli) with tiny hairs. The characteristic produces a sticky substance that provides an excellent grip, letting the insect scale almost anything.
  • Flies can see in nearly 360-degree surround. That’s to the side, up, down, and behind themselves. The eyes don’t move because of its spherical protrusion and shape. Unlike humans, the creature has compound eyes. The feature allows them to view in all directions which is how they so quickly react to perceived disturbances with great speed.
  • Even their breeding habits are disgusting. We rush expecting mothers to the cleanest environment we can find for birthing. Flies happily lay their eggs in rotting carcasses, feces, garbage or other undesirable elements. There’s a method to the horrendous. Those environments provide birthing maggots with something to diet on after the gestation period.

Evolution and Origins

Originally hailing from the steppes of central Asia, this ubiquitous fly has since spread to every inhabited continent, thriving in diverse climates spanning from tropical to temperate. It has successfully adapted to a wide range of environments, encompassing both rural and urban settings.

According to research, it is believed that house flies (Musca domestica) likely originated in the Middle East. They have a remarkable history, dating back at least 65 million years.

Some sources even suggest that house flies may have arrived in the Americas alongside or possibly even before Columbus, potentially with individuals such as Brendan the Irish monk around AD 550.

Species, Types, and Scientific Names

Animals With The Shortest Lifespan

The housefly has spread all over the world as a commensal of humans. It is the most common fly species found in houses.

The housefly lives close to people. They feed on waste and foodstuff wherever they find it in a habitat, transporting various disease agents along the way with speed.

All species in the Musca domestic family adapt to human cohabitation. They have another thing in common: they’re threats to our health.

Over its life cycle, the fly is a spreader of varying infections. Science links blowflies to enteric infection transmission. That includes diarrhea, dysentery, typhoid, and cholera. Other health concerns fly brings to the table are trachoma and epidemic conjunctivitis (eye infections), cutaneous diphtheria, yaws, leprosy, and mycoses (skin diseases).

Here are some of the more common species of the housefly.

Filth Flies

Filth fly is the actual term used for the entire spectrum of flies, for all the obvious reasons.

Large Filth Flies

Common Housefly

The common housefly goes after your food and insists on flying around your face when you’re trying to rest. The insects search for food and waste not just for eating but to lay eggs. There isn’t any part of the world where these annoyances aren’t invading sewers, trashcans, carrions, or feces.

Blow Flies

Known also as bottle flies, the blowfly generates its offspring in rotting meat or carrion. Two of the most common bugs here are the blue bottle fly and the black blowfly. If you see these critters that likely means you have some type of animal carcass in the walls, attic, or basement

Small Filth Flies

Drain Fly

Mistaken often for a smaller housefly, the drain fly is unique unto itself with its moth-like or furry appearance. The creature prefers sink drains and unused garbage disposals. They drop eggs in the built-up sludge in pipes. Pest control can be problematic as breeding sites can be hard to reach.

Lesser Housefly

The lesser version of flies is noted for being about two-thirds the size of its cousin. The pests create the same problems on a big scale throughout their lifespan.

Fruit Fly

Fruit flies live in drain lines, or any source of moisture such as, say, a dirty garbage can. In your kitchen, they go for a diet of soda, vinegar, or overripe produce juice. The fruit fly gets into liquids and sticky syrups, contaminating them. Their invasions take place pretty much in the summer and fall. But they can occur any time of the year if the flies can find sound reproductive sites and suitable food sources.

Cluster Flies

Cluster flies are larger than the common type. They claw to get indoors during autumn to get out of the cold. Once inside, the pests proceed to populate spaces. Growing in numbers, they settle in walls and attics. Once things warm up, they will look for an escape. The critters infest your home while desperately searching for a way out.

Stable Fly

The stable fly is an animal found almost anywhere you might come across another animal. The insect is a bloodsucker. Unable to find animals, they will attack pets and humans. The aggravating creatures are also called dog flies (canines are easy prey) and biting flies (they resemble the common species).

Appearance: How to Identify Them

housefly on green leaf

The female housefly is generally bigger than the male.

Let’s take a look at the morphology of these insects.

  • Flies are typically gray or black with four longitudinal stripes on the thorax. The bodies are slightly hairy and oval. They take to the air via a pair of membranous wings. Flies have six legs and antennae.
  • Adults are between one-eighth and one-quarter inches long. Females are generally bigger than males. Flies tend to have a weight between 0.00007 and 0.0016 ounces.
  • The pests have red, compound eyes. Overall, arthropods have compound eyes. Crustaceans and insects with compound eyes have poor image resolution but also have a wide range of views. The feature lets flies detect movement from most directions and react with great speed.

Habitat: Where to Find the Them

Deadliest Animal in the World: Tsetse flies

Tsetse flies are found in Africa, living in damp areas along the banks of rivers and lakes. They are the size of a large housefly and feed only on blood.

There is almost no environment the housefly can’t adapt to.

During the gestation period, larvae live on moisture so flies lay eggs wherever they find it. Some species use ponds, lakes, marshes, swamps, and birdbaths.

Believe it or don’t, these nasty bugs use their 28-day lifespan to better the earth. They’re considered beneficial to nature as decomposers of decaying and dead organisms. Flies are critical to the food chain, serving as meals for reptiles, birds, fish, and even certain plants.

Diet: What Do Flies Eat?

The housefly gnaws at almost anything — the food you leave on your plate, carrion, fecal matter, spills, etc. The insect has no teeth. The animal uses its sponging mouth to liquefy meals, regurgitating the substance before ingesting it.

They’re attracted to a wide array of substances such as the following:

  • Overripe vegetables and fruit
  • Feces
  • Sugary and syrupy substances
  • Liquids of all types
  • Meat
  • Carrions

What Eats the Housefly

The most famous housefly predator is the frog. Who hasn’t seen the image of a frog flicking its tongue to catch one of these unsuspecting bugs? There’s also the spider who traps flies in webs.

Many creatures eat fly larvae, including fowl, mites, wasps, and crickets. Some animals attracted to the same vegetables and fruits that draw in flies, will chow down on the larvae in them. Some animals also eat pupae beneath trees.

Prevention: How to Get Rid of Flies

housefly on window pane

housefly on window pane

Here are tips for dealing with flies and pest control, putting an end to their lifespan.

  • Certain flowers and herbs chase flies away. Plant basil, lavender, catnip, bay leaves, and marigold in your garden and around the property.
  • Light traps capture flies or kill them with a zap. Keep the instruments hung high, at least five feet off the floor.
  • A mix of dish soap and vinegar is another deterrent to trap flies. You need a few drops of soap and an inch of apple cider vinegar. Cover the glass with plastic wrap and a rubber band. Poke holes in the wrap. Flies will enter and can’t lift their weight if they land on the liquid.
  • Venus flytraps, planted outside, will eat the insects.
  • Insecticides, traps, and repellants come in a variety of options. Flies can develop an immunity to most products though. Be sure to buy indoor usage only and ventilate well after applying.
  • Sticky traps are popular resources. Place them around the house. Drawn to sticky surfaces, flies will go to the devices.
  • If the situation is unbearable, reach out to a local exterminator.
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Rebecca Bales

About the Author

Rebecca Bales

Rebecca is an experienced Professional Freelancer with nearly a decade of expertise in writing SEO Content, Digital Illustrations, and Graphic Design. When not engrossed in her creative endeavors, Rebecca dedicates her time to cycling and filming her nature adventures. When not focused on her passion for creating and crafting optimized materials, she harbors a deep fascination and love for cats, jumping spiders, and pet rats.
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Housefly FAQs (Frequently Asked Questions)

Yes. Throughout the life cycle, they are carriers of untold bacteria. Some species bite to get blood beneath the skin.