Urocerus flavicornis

Not established in Britain or Ireland. A rare introduction in imported timber.

The eye spots on the head are widely separated as in U. gigas. The female abdomen is yellow to reddish brown on tergite 2, 7 and 8 (in the basal half) with the remainder black. The male abdomen is yellow with black basally and apically.

Urocerus flavicornis larvae feed in timber of coniferous trees and take 2 to 3 years to develop.

Jump to other Urocerus species

Size: 12 - 40mm

Status: Not established, occasionally introduced.

Distribution: Not established

Flight period: June to October

Plant associations: Pinaceae (coniferous trees)


Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London

Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168. https://doi.org/10.3897/BDJ.2.e1168

Schiff, N.M., Goulet, H., Smith, D.R., Boudreault, C., Wilson, A.D. and Scheffler, B.E., 2012. Siricidae (Hymenoptera: Symphyta: Siricoidea) of the western hemisphere. Canadian Journal of Arthropod Identification 21: 1-305, 21, pp.1-305.