Fannia fuscula
This record describes Fannia fuscula (species). Recorded family: Fanniidae. Recorded order: Diptera.
Identification and Appearance

Dark species, with reddish/yellowish tibia and slightly orange wings. Female with 8th abdominal sternite bulging and shiny (usually requires dissection to see,) male with strong ventral spines on the sternopleura and mid coxae, frons relatively narrow in both sexes.
Classification
Habitat and Range
Geographic Range
Holarctic, widely distributed across Europe, Northern Asia, and North America.
Diet and Behavior
Diet: Reared from rotting mushrooms and has been found attracted to bee and wasp nests and vertebrate carrion, probably a generalist in rotting organic material like most Fannia .
About Flies: the wider group
Order-level background for Diptera, the group containing Fannia fuscula. Species-specific details appear above.
Group overview
Diptera includes over 150,000 described species of flies, mosquitoes, and midges. Mosquitoes are the deadliest animal on Earth (CDC). Malaria alone causes ~249 million cases and over 608,000 deaths annually, mostly children under 5 (WHO). Vector-borne diseases account for over 17% of all infectious diseases, causing 700,000+ deaths per year.
Ecological role of the group
Despite their disease impact, flies are critical decomposers and pollinators. Hoverflies alone pollinate hundreds of crop and wildflower species. Flies are also the primary food source for many birds, bats, and fish. Forensic entomology relies heavily on fly species for crime scene analysis.
Economic and practical significance of the group
In the U.S., vector-borne disease cases tripled between 2004-2016, with over 640,000 cases reported in that period (CDC). Tickborne diseases doubled from 22,000 to 48,000 annual reports. Globally, mosquito-borne diseases cost billions in healthcare and lost productivity.
Recorded sources for this group: WHO, CDC, PNAS. Imported estimates may describe particular regions or reporting periods.
Photos of Fannia fuscula (2)
Photo credits: Contributed by Bennett Grappone
Frequently Asked Questions About Fannia fuscula
What is Fannia fuscula?
Fannia fuscula is a species in the family Fanniidae, within the order Diptera.
How big is Fannia fuscula?
5-7 mm
How do you identify Fannia fuscula?
Dark species, with reddish/yellowish tibia and slightly orange wings. Female with 8th abdominal sternite bulging and shiny (usually requires dissection to see,) male with strong ventral spines on the sternopleura and mid coxae, frons relatively narrow in both sexes.
Where is Fannia fuscula found?
Range: Holarctic, widely distributed across Europe, Northern Asia, and North America.
What does Fannia fuscula eat?
The diet of the Fannia fuscula includes Reared from rotting mushrooms and has been found attracted to bee and wasp nests and vertebrate carrion, probably a generalist in rotting organic material like most Fannia ..
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