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For Insects, Spiders & Their Kin
For the United States & Canada
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Species Urocerus flavicornis - Yellow-horned Horntail Wasp

Oregon Horntail - Urocerus flavicornis - female Observed in Jasper Alberta - Urocerus flavicornis Tremex columba??? In Alberta - Urocerus flavicornis Unknown Wasp - Urocerus flavicornis - female Tremex - Urocerus flavicornis Wasp - Urocerus flavicornis - female Urocerus flavicornis? - Urocerus flavicornis - female Yellow-horned Horntail - Urocerus flavicornis - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Symphyta" - Sawflies, Horntails, and Wood Wasps)
Family Siricidae (Horntail Wasps)
Subfamily Siricinae
Genus Urocerus
Species flavicornis (Yellow-horned Horntail Wasp)
Synonyms and other taxonomic changes
=Urocerus gigas flavicornis
Explanation of Names
Urocerus flavicornis (Fabricius)
10-40 mm (males smaller than females); larvae up to 30 mm
Females have the 1st, 6th, and part of the 7th abdominal segments yellow. Males have the 2nd - 5th orange-yellow.(1)
all forested regions across Canada and the US(2) (LB-AK south to NH, NM & CA)(3)
hosts include fir, larch, spruce, pine, and Douglas-fir(3)
Works Cited
1.Eastern Forest Insects
Whiteford L. Baker. 1972. U.S. Department of Agriculture · Forest Service.
2.Siricidae (Hymenoptera: Symphyta: Siricoidea) of the Western Hemisphere
Schiff, N.M., Goulet, H., Smith, D.R., Boudreault, C., Wilson, A.D., and Scheffler, B.E. 2012. Canadian Journal of Arthropod Identification No. 21: 305 pp.
3.Guide to the siricid woodwasps of North America
Schiff N.M., Valley S.A., LaBonte J.R., Smith D.R. 2006. USDA Forest Service, Forest Health Technology Enterprise Team, Morgantown, WV. 101 pp.