Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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Family Micropezidae - Stilt-legged Flies

Stilt Fly - Rainieria antennaepes Critter - Compsobata univitta Unidentified Fly - Rainieria antennaepes Stilt-legged Fly - Grallipeza nebulosa fly - Rainieria antennaepes Stilt-Legged Flies Mating - Calobatina geometra - male - female Stilt-legged Fly - Taeniaptera trivittata Taeniaptera trivittata - male - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Nerioidea
Family Micropezidae (Stilt-legged Flies)
Other Common Names
Small-footed Flies
>30 spp. in 9 genera in our area(1), ~600 spp. in >60 genera worldwide(2)
4-15 mm
Known for their walking around and lifting their prominently marked front legs imitating ichneumon wasps(3)
See Cresson (1938) for keys and descriptions for genera and species in our area.
A key to the genera and the 22 spp. occurring west of the Rockies appears in(4), together with brief comments on each.
Worldwide, much more diverse in the tropics, poorly represented in cooler climes(3)
Moist areas, marshes, wet woods
Adults of some species are attracted to rotting fruit or dung; in other species adults are predaceous; larvae saprophagous
Print References
Cresson, E.T. (1938). The Neriidae and Micropezidae of America north of Mexico (Diptera). Trans. Amer. Entomol. Soc., 64:293-366 (Read online from Cornell Library or JSTOR)
Merritt, R. W. (1972). Geographic Distribution of Micropezidae in the Western United States (Diptera). Northwest Sci. 46( 1):40-43. (PDF)
Internet References
Herschel Raney: key to genera, family page.