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Fanniidae - Lesser-houseflies



BRACHYCERA, Muscomorpha Schizophora Calyptratae, Muscoidea

Number of British species: 60

Size: S-M

Difficulty: 2-3



Small to medium sized (2-5 mm, some up to 9 mm) flies, usually with grey to black body colour. Occiput without white or pallid, thin hair-like bristles; arista bare to pubescent; interfrontal bristles absent. Meral bristles absent; lower side of scutellum bare in its middle region; subscutellum absent. Lower calypter small. Apical half of vein Sc straight; vein M1 not strongly curving; anal vein not reaching the wing margin; vein A2 and the anal vein would intersect if A2 would continue further. Tibia of hind leg with a submedian dorsal bristle.


The larvae are saprophagous and feed mostly among decaying organic materials. Many are surface scrapers, feeding on micro-organisms on the surface of the substrate, which include a wide range of vegetable and animal detritus, mushrooms, nests or burrows of birds, mammals and insects dead insects, molluscs and vertebrates, animal droppings and dung, human faeces etc. The adults occur mainly in or near woodland areas and less in more open habitats. The males of several species fly in swarms. Some species have successfully adapted to the human environment and are frequently met with indoors. Good examples are Fannia canicularis (Linnaeus) (the lesser housefly) and F. scalaris (Fabricius) (the latrine fly).


families/brachycera/calyptrates/fanniidae.txt · Last modified: 2008/05/24 17:01 (external edit)     Back to top
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