Phaonia signata
This record describes Phaonia signata (species). Recorded family: Muscidae. Recorded order: Diptera.
Identification and Appearance
c7mm. This is a very common fly, appearing early in the year when it appears in warm days from February and also in late Autumn when it it usually seen sunning on fences and walls. It has a dull brown abdomen with darker transverse blotches, red femora and tibiae (though the front femora is often darkened) and infuscated cross-veins on the wings. It has a reddish tip to the scutellum and to the basal segment of the antennae. It also has a strong posterodorsal bristle near the base of the hind tibia and the costal edge of the wing bulges out - both these features are typical of the Phaonia genus. See Identification Aids below for an illustrated guide to identifying this fly. Phaonia tuguriorum has now recognised as a largely Mediterranean species and the very similar Phaonia signata is the correct north-western Europe species. Other Phaonia species, particularly P. errans and P. fuscata which have similar leg colours. P. errans has black antennae and 2 post-sutoral acrostichals. P. fuscata has only 3 post-sutoral dorsocentrals (the other two have 4). with a quality image showing the key features.
Classification
Habitat and Range
Habitat
Various habitats and often seen around habitation, particularly sunning on walls and fences.
Seasonal Activity
It is one of the earliest flies to appear each year, often seen sun-bathing on sunny walls and fences from February and can be seen until the end of October.
Additional species information
Recorded status
Common and widespread in England and Wales.
About Flies: the wider group
Order-level background for Diptera, the group containing Phaonia signata. 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.
Frequently Asked Questions About Phaonia signata
What is Phaonia signata?
Phaonia signata is a species in the family Muscidae, within the order Diptera.
How do you identify Phaonia signata?
Aids below for an illustrated guide to identifying this fly.
Where is Phaonia signata found?
Habitat: Various habitats and often seen around habitation, particularly sunning on walls and fences.
When is Phaonia signata active?
Phaonia signata: seasonal activity - It is one of the earliest flies to appear each year, often seen sun-bathing on sunny walls and fences from February and can be seen until the end of October..