Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Species Rhagoletis completa - Walnut Husk Fly

Walnut Husk Fly? - Rhagoletis completa # 12 - Rhagoletis completa # 12 - Rhagoletis completa Walnut Husk Flies - Rhagoletis completa - male - female 2416 - Rhagoletis completa - male Rhagoletis completa? - Rhagoletis completa Unknown Tephritidae - Rhagoletis completa Rhagoletis completa - Walnut Husk Fly - Rhagoletis completa - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Tephritoidea
Family Tephritidae (Fruit Flies)
Subfamily Trypetinae
Tribe Carpomyini
Subtribe Carpomyina
Genus Rhagoletis
Species completa (Walnut Husk Fly)
Adult 6 mm, fully grown larva 13 mm
Yellow spot just below the areas where the wings are attached; iridescent, greenish eyes; wings with three prominent dark bands. Female larger than male and with pointy abdomen.
native to NA, originated east of the Rocky Mountains, then spread elsewhere (first seen in CA in 1926, in Europe in the 1980s --widely spread since)(1)
Walnut husks primarily. It can attack other plants, such as peaches.
Life Cycle
One generation a year. Overwinters as pupa. Peak emergence mid July to mid August.
Damages walnuts, serious pest of walnut orchards
Internet References
Fact sheets by C. Pickel, H. Riedl
Works Cited
1.Alien terrestrial arthropods of Europe
Roques A., Kenis M., Lees D., Lopez-Vaamonde C., Rabitsch W., Rasplus J.-Y., Roy D., eds. 2010. BioRisk 4 Special Issue; 2 vols., 1028 pp.