Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Pollenia rudis

Fly - Pollenia rudis - male Pollenia? - Pollenia rudis - female  blow fly? - Pollenia rudis Pollenia rudis? - Pollenia rudis - female Pollenia rudis? - Pollenia rudis - female Pollenia rudis? - Pollenia rudis - female Calliphora? - Pollenia rudis - female Pollenia rudis? - Pollenia rudis - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Calyptratae)
Superfamily Oestroidea
Family Polleniidae
Genus Pollenia (Cluster flies)
Species rudis (Pollenia rudis)
Synonyms and other taxonomic changes
Pollenia rudis (Fabricius, 1794)
Adults are slightly larger than house flies (Musca domestica), dull grey with black markings and golden-yellow hairs on thorax. The hairs are more numerous on the underside, near the legs. See (1) for photo key to species occurring in North America.
Life Cycle
The immature stages, eggs and larvae, are are seldom seen because they are deposited on the soil and they burrow into earthworms which they parasitize. Maggots are cream colored, elongated and wedge shaped.
Probably from Europe. They may have found their way to America in the ballast of ships containing soil, probably along with introduced earthworms.
Internet References
Fact sheet (Russell H.)
Penn State. (Steve Jacobs, Sr. Extension Associate)
Biological Survey. Cluster Flies (Calliphoridae: Polleniinae: Pollenia) of North America, page 15
Works Cited
1.Cluster flies (Calliphoridae: Polleniinae: Pollenia) of North America
Adam Jewiss-Gaines, Stephen A. Marshall, and Terry L. Whitworth. 2012. Canadian Journal of Arthropod Identification.