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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Flies (Diptera) » "Orthorrhapha" (Brachycera excluding Aschiza and Schizophora) » Tabanomorpha » Horse and Deer Flies (Tabanidae) » Horse Flies (Tabaninae)
Photo#136415
Horse Flies
Copyright © 2007 Debbi Brusco

Horse Flies
Fremont Peak State Park near San Juan Bautista, San Benito County, California, USA
August 11, 2007
Size: 3-3.5cm
These mating insects were on dried grass near the peak.
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Contributed by Debbi Brusco on 13 August, 2007 - 3:57pm
Last updated 13 August, 2007 - 8:36pm

Horse flies
These are mating horse flies. Too dark to tell what species.
… JBurger, 14 August, 2007 - 2:26pm login or register to post comments

Uncertain, but I don't think these are syrphids.
Just checked several pages of posts here. None showed syrphids mating end-to-end, and I've never seen them arranged that way in the wild, either. Shape of abdomen also strikes me as different, but I'm no expert.
… Ron Hemberger, 13 August, 2007 - 4:15pm login or register to post comments

 
Tabanids.
These are horse flies of some kind, family Tabanidae.
… Eric R. Eaton, 13 August, 2007 - 6:28pm login or register to post comments

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