Poecilanthrax effrenus
This record describes Poecilanthrax effrenus (species). Recorded family: Bombyliidae. Recorded order: Diptera.
Identification and Appearance

Description from Painter and Hall (1960):
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Diptera (Flies)
- Superfamily
- Asiloidea
- Family
- Bombyliidae (Bee Flies)
- Subfamily
- Anthracinae
- Tribe
- Villini
- Genus
- Poecilanthrax
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
Southwestern United States into Mexico: southwestern Oklahoma, central Texas, west to southern California (Painter and Hall, 1960); + southern Nevada (BugGuide record).
Additional species information
Species notes from the sources
Etymology: Latin effrenus (effrēnus) unbridled, unrestrained (Latin dictionary).
About Flies: the wider group
Order-level background for Diptera, the group containing Poecilanthrax effrenus. 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 Poecilanthrax effrenus (5)
Photo credits: Contributed by Joel Kits; Additional contributions by cotinis , Hartmut Wisch
Frequently Asked Questions About Poecilanthrax effrenus
What is Poecilanthrax effrenus?
Poecilanthrax effrenus is a species in the family Bombyliidae, within the order Diptera.
How big is Poecilanthrax effrenus?
12 mm body length (Coquillett, 1887)
How do you identify Poecilanthrax effrenus?
Description from Painter and Hall (1960):
Where is Poecilanthrax effrenus found?
Range: Southwestern United States into Mexico: southwestern Oklahoma, central Texas, west to southern California (Painter and Hall, 1960); + southern Nevada (BugGuide record).
FROM LOOKING IT UP TO GETTING TO KNOW IT
Make sense of the bugs at home.50 household bug profiles for you. Photos, coloring, and activities for curious kids.





