Urocerus 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.

Contents

• Urocerus gigas emerging from white spruce
• Nature photos shows urocerus gigas and rhyssa persuasoria egg laying
• References

Subspecies:

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].