Hilara seriata
This record describes Hilara seriata (species). Recorded family: Empididae. Recorded order: Diptera.
Identification and Appearance

Males come in two forms, one with greatly enlarged front basitarsi and dense hairs on mid legs, the other with normal front basitarsi and weak hairs on mid legs.
Classification
Habitat and Range
Geographic Range
Eastern North America (Virginia to Newfoundland)
Seasonal Activity
Most common in May and June
About Flies: the wider group
Order-level background for Diptera, the group containing Hilara seriata. 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 Hilara seriata (5)
Photo credits: Contributed by John F. Carr
Frequently Asked Questions About Hilara seriata
What is Hilara seriata?
Hilara seriata is a species in the family Empididae, within the order Diptera.
Where is Hilara seriata found?
Range: Eastern North America (Virginia to Newfoundland)
When is Hilara seriata active?
Hilara seriata: seasonal activity - Most common in May and June.
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