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



Species Ornidia obesa - Green Jewel Fly

Another Ornidia - Ornidia obesa - male Just beautiful - Ornidia obesa - male Blue-green Fly - Ornidia obesa - female fly - Ornidia obesa Fly - Ornidia obesa Black hovering bug - Ornidia obesa Green-eyed, green-faced hoverfly (?) - Ornidia obesa id galactic 11.28.22 - Ornidia obesa
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Aschiza")
Family Syrphidae (Hover Flies)
Subfamily Eristalinae
Tribe Volucellini
Genus Ornidia
Species obesa (Green Jewel Fly)
Synonyms and other taxonomic changes
Syrphus obesus Fabricus 1775
Musca obesa Gmelin 1790
Volucella obesa Wiedemann 1830
Ornidia obesa Lepeletier & Serville 1828
Volucella obesoides Giglio-Tos 1892
Ornidia obesoides Curran 1930
Body shiny, metallic, green or purplish-blue. Wings mostly hyaline, but with two spots along anterior margin: one near middle, the other smaller and before the apex. Scutellum with a shallow transverse depression before posterior edge.
Widespread and common in the New World tropics...reaching north into our area from Colorado east to Massachusetts and New York (also in Hawaii).
Native to New World tropics; historically had spread to various tropical islands of the Pacific & Indian Ocean, and to parts of tropical Africa (see GBIF map), but has become less common in the Old World with improved sanitation [Thompson(1991)]
Has been found breeding in semiliquid synanthropic material, such as animal dung, human feces, sewage, and rotten fruits and vegetables [(1), Martins et. al. (2010)].
A hemisynanthropic species, meaning one associated with and making use of resources available in (often rural) human settlements, but not restricted to or entirely dependent on such habitat.
Known to carry bacteria of public health importance (Salmonella, Shigella, Mycobacterium) [Thompson(1991), Martins et. al.(2010)]
Maggots convert coffee-production waste into protein sources for cattle feed [Lardé(1990)]
In a large scale study of the role of insects in reclamation of urban solid waste through compost (sampling 4000 kg, i.e. more than 8.4 tons), undertaken in the tropics (near Medellín, Columbia), more than 95% of the insects present were found to be dipterans, and of those O. obesa was highly important as the dominant species present throughout the process [Morales & Wolff(2010)].
Print References
Lardé, G. (1990). Growth of Ornidia obesa (Diptera: Syrphidae) larvae on decomposing coffee pulp. Biological Wastes 34: 73−76. (Abstract)
Martins, E., Neves, J. A., Moretti, T. C., Godoy, W. A., & Thyssen, P. J. (2010). Breeding of Ornidia obesa (Diptera: Syrphidae: Eristalinae) on pig carcasses in Brazil. Journal of Medical Entomology, 47(4), 690–694. (Full Text)
Morales, G.E. & Wolf, M. (2010). Insects associated with the composting process of solid urban waste separated at the source. Revista Brasileira de Entomologia 54(4): 645–653 (Full Text)
Rotheray G. E., Hancock E. G., Marcos-García M. A., Zumbado M. (2005). Early stages and breeding sites of three species of Neotropical Ornidia (Diptera, Syrphidae). Studia Dipterol. 12: 419–427.
Thompson F. C. (1991). The flower fly genus Ornidia (Diptera: Syrphidae). Proc. Entomol. Soc. Wash. 93: 248–261 (Full Text)
Internet References
"Zoomable" specimen image from the Smithsonian insect collection.
GBIF species page, with distribution map, images, and other info.
Works Cited
1.The Diptera Site