Urocerus gigas

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Urocerus gigas
Urocerus gigas5.jpg
Female ovipositing
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Siricidae
Genus: Urocerus
Species: U. gigas
Binomial name
Urocerus gigas
Linnaeus, 1758

Sirex gigas

Urocerus gigas (giant woodwasp, banded horntail, greater horntail) is a species of sawfly, native to the Palaearctic and North Africa. Adults are usually between 10 and 40mm (0.5 to 1.5 inches) in length.[1]



  • U. gigas gigas
  • U. gigas taiganus

U. gigas is a wood boring insect which attacks softwoods of freshly felled logs/unhealthy trees. The species leaves discrete tunnels, frequently filled with hard packed coarse fibrous frass, hard to dig out from tunnels. The tunnels are large, round and discrete between 6-7mm.

Urocerus flavicornis was once considered a subspecies of gigas, but is now a separate species [1].


  1. ^ "Giant Woodwasp- Urocerus gigas". Massnrc.org. 2008-02-25. Retrieved 2014-06-18. 

Media related to Urocerus gigas at Wikimedia Commons