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

Species Urocerus gigas - Giant Woodwasp

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 (Horntails)
Subfamily Siricinae
Genus Urocerus
Species gigas (Giant Woodwasp)
Other Common Names
Greater Horntail, Banded Horntail, Yellow-horned Horntail
Explanation of Names
Author: Linnaeus 1758 (first described as Ichneumon gigas)
Latin gigas, 'huge'
4 subspecies, of which one in our area and three in the Old World(1)
10-40 mm (males smaller than females); larvae up to 30 mm
subspecies are rather poorly defined based mostly on coloration and range, so differentiating between the native and introduced specimens is not always possible(1)
Holarctic and Oriental, represented in our area by U. g. flavicornis, the the North American subspecies; exotic subspecies are often intercepted in NA and around the world, mainly in ports(1)
hosts include various Pinaceae and some hardwoods, such as ash (Fraxinus) and cottonwood (Populus)(1)
A dangerous pests of conifers
Internet References