Picture-winged Fly
Scientific Name: Delphinia picta
Order & Family: Diptera: Ulidiidae
Size: Approximately 7-9 mm in length.

Natural Habitat
Gardens, woodlands, and damp areas with decaying organic matter across North America.
Diet & Feeding
Larvae feed on decaying plant matter; adults feed on organic fluids such as nectar, sap, or fluids from decomposing vegetation.
Behavior Patterns
Notable for their unique wing-waving behavior, they move their patterned wings in rotating motions to communicate and deter predators. They are often mistaken for fruit flies due to wing patterns.
Risks & Benefits
Generally harmless to humans and are not known to transmit diseases. They provide ecosystem benefits as decomposers of organic material.
Identified on: 5/26/2026