A report on Housefly

Head of a female housefly with two large compound eyes and three ocelli
Housefly mouthparts, showing the pseudotracheae, semitubular grooves (dark parallel bands) used for sucking up liquid food
A housefly wing under 250x magnification
Micrograph of the tarsus of the leg showing claws and bristles, including the central one between the two pulvilli known as the empodium
Houseflies mating
Housefly larva and adult, by Amedeo John Engel Terzi (1872–1956)
Housefly pupae killed by parasitoid wasp larvae: Each pupa has one hole through which a single adult wasp has emerged; the wasp larvae fed on the housefly larvae.
Housefly killed by the pathogenic fungus Entomophthora muscae
Housefly lapping up food from a plate
Philadelphia Department of Health poster warning the public of housefly hazards (c. 1942)
Detail of a 1742 painting by Frans van der Mijn that uses a housefly in a Renaissance allegory of touch theme
William Blake's illustration of "The Fly" in Songs of Innocence and of Experience (1794)

Fly of the suborder Cyclorrhapha.

- Housefly

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Fly

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Flies are insects of the order Diptera, the name being derived from the Greek δι- di- "two", and πτερόν pteron "wing".

Flies are insects of the order Diptera, the name being derived from the Greek δι- di- "two", and πτερόν pteron "wing".

An Anthomyiidae species showing characteristic dipteran features: large eyes, small antennae, sucking mouthparts, single pair of flying wings, hindwings reduced to clublike halteres
Fossil brachyceran in Baltic amber. Lower Eocene, c. 50 million years ago
Fossil nematoceran in Dominican amber. Sandfly, Lutzomyia adiketis (Psychodidae), Early Miocene, c. 20 million years ago
Gauromydas heros is the largest fly in the world.
Head of a horse-fly showing large compound eyes and stout piercing mouthparts
A head of a fly, showing the two compound eyes and three simple eyes clearly.
A cranefly, showing the hind wings reduced to drumstick-shaped halteres
Tabanid fly in flight
Mating anthomyiid flies
Life cycle of stable fly Stomoxys calcitrans, showing eggs, 3 larval instars, pupa, and adult
A calliphorid "bubbling"
The large bee-fly, Bombylius major, is a Batesian mimic of bees.
Petrus Christus's 1446 painting Portrait of a Carthusian has a musca depicta (painted fly) on a trompe-l'œil frame.
An Anopheles stephensi mosquito drinking human blood. The species carries malaria.
Diptera in research: Drosophila melanogaster fruit fly larvae being bred in tubes in a genetics laboratory
Casu marzu is a traditional Sardinian sheep milk cheese that contains larvae of the cheese fly, Piophila casei.

Fruit flies are used as model organisms in research, but less benignly, mosquitoes are vectors for malaria, dengue, West Nile fever, yellow fever, encephalitis, and other infectious diseases; and houseflies, commensal with humans all over the world, spread food-borne illnesses.

Maggots feeding on an opossum carrion

Maggot

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Maggots feeding on an opossum carrion
Maggots on a porcupine carcass
Maggots from a rabbit.

A maggot is the larva of a fly (order Diptera); it is applied in particular to the larvae of Brachycera flies, such as houseflies, cheese flies, and blowflies, rather than larvae of the Nematocera, such as mosquitoes and crane flies.

Histeridae

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Family of beetles commonly known as clown beetles or Hister beetles.

Family of beetles commonly known as clown beetles or Hister beetles.

Hister unicolor

Also, certain species are used in the control of livestock pests that infest dung and to control houseflies.

Diagram of biramous leg of a trilobite; Agnostus spp.

Arthropod leg

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Form of jointed appendage of arthropods, usually used for walking.

Form of jointed appendage of arthropods, usually used for walking.

Diagram of biramous leg of a trilobite; Agnostus spp.
Crustacean appendages
Micrograph of housefly leg
Diagram of a spider leg and pedipalp – the pedipalp has one fewer segment
The leg of a squat lobster, showing the segments; the ischium and merus are fused in many decapods
Seven-segmented legs of Scutigera coleoptrata
Zabalius aridus showing full leg anatomy, including plantulae under each tarsomere
Diagram of a typical insect leg
Acanthacris ruficornis, legs saltatorial, femora with bipennate muscle attachments, spines on tibiae painfully effective in a defensive kick
Robber fly (Asilidae), showing tarsomeres and pretarsi with ungues, pulvilli and empodia
Webspinner, Embia major, front leg showing enlarged tarsomere, which contains the silk-spinning organs
Bruchine with powerful femora used for escape from hard-shelled seed
Expression of Hox genes in the body segments of different groups of arthropod, as traced by evolutionary developmental biology. The Hox genes 7, 8, and 9 correspond in these groups but are shifted (by heterochrony) by up to three segments. Segments with maxillopeds have Hox gene 7. Fossil trilobites probably had three body regions, each with a unique combination of Hox genes.

A representative insect leg, such as that of a housefly or cockroach, has the following parts, in sequence from most proximal to most distal:

Cosmopolitan distribution

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Said to have a cosmopolitan distribution if its range extends across all or most of the world in appropriate habitats.

Said to have a cosmopolitan distribution if its range extends across all or most of the world in appropriate habitats.

For example, the housefly is nearly as cosmopolitan as any animal species, but it is neither oceanic nor polar in its distribution.

Black Soldier Fly larvae produced as animal feed

Insects as feed

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Insects as feed are insect species used as animal feed, either for livestock, including aquaculture, or as pet food.

Insects as feed are insect species used as animal feed, either for livestock, including aquaculture, or as pet food.

Black Soldier Fly larvae produced as animal feed

Black-soldier flies, common house fly larvae and mealworms are some of the most common insects in animal feed production.

Halteres

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Impetus in leaping) are a pair of small club-shaped organs on the body of two orders of flying insects that provide information about body rotations during flight.

Impetus in leaping) are a pair of small club-shaped organs on the body of two orders of flying insects that provide information about body rotations during flight.

Cranefly haltere
Directions of rotation
Strepsipteran halteres: teardrop-shaped structures located between the fore and mid legs (indicated by red arrows)
Fly thorax showing side view of dorsal longitudinal (DLM; upper left) and dorso-ventral (DVM; upper right) power flight muscles. Bottom image shows transverse cross section of fly.
Motion of an insect wing: a wings b primary and secondary flight joints c dorsoventral flight muscles d longitudinal muscles
Electron micrograph of fly haltere and surrounding structures: 
1 calyptra (squama)
2 upper calypter (antisquama)
3 haltere
4 mesopleuron
5 hypopleuron
6 coxa
7 wing
8 abdominal segment
9 mesonotum
c capitellum of haltere
p pedicel of haltere
s scabellum of haltere
Haltere length and shape varies from species to species.
Diagram of the six major fields of campaniforms on the haltere. Four fields are located dorsally -- the dorsal Hick's papillae (dHP), dorsal basal plate (dBP), dorsal scapal plate (dSP), and the dorsal flanking sensilla (FS). Two fields are located ventrally, the ventral Hick's papillae (vHP) and the ventral scapal plate (vSP).

Examples of insects with halteres are houseflies, mosquitoes, gnats, strepsiptera, and craneflies.

Lesser house fly

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The lesser house fly or little house fly, Fannia canicularis, is somewhat smaller (3.5 - 6 mm) than the common housefly.

Stable fly

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Commonly called the stable fly, barn fly, biting house fly, dog fly, or power mower fly.

Commonly called the stable fly, barn fly, biting house fly, dog fly, or power mower fly.

Sucking human blood

The stable fly resembles the common housefly (Musca domestica), though smaller, and on closer examination has a slightly wider and spotted abdomen.

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Pulvilli

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Pulvilli are soft, cushionlike pads on the feet of insects and other arthropods, such as the housefly and ixodid ticks.