Euura poecilonota

Males are very rare and the species is likely parthenogenic in Europe. Very variable in colour and size but the pale colour is green in life fading to yellow. The head is light yellow with black antennae and a black frontal ocellar spot, which can occupy the whole occipital area. The thorax in the male is ​​black. The posterior corners of the pronotum, tegulae and more or less the mesopleura are pale. The female thorax is pale with black stripes on the mesonotum, and black marks on the scutellum and the scutellar appendage. The abdomen is pale below and mostly completely black above in the male, and in the female with a more or less broad middle stripe. The legs are pale with the apices of the tibiae and the tarsi black.

Euura poecilonota larvae feed on birches. Females cut distinctive slits through the leaf blade before depositing an elongate ovum adjacent to a secondary vein.  In captivity, females prefer to oviposit in low light levels around dawn and dusk. The ovum is green and may burst out of the leaf as it swells. Larvae hatch after 1-2 weeks.

Size: Female: 6.0 - 8.0mm.

Status: Common

Distribution: England, Scotland, Wales, Ireland

Flight period: April to September

Plant associations: Betula spp. (birches)


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.

Muche, W.H., 1974. Die Nematinengattungen Pristiphora Latreille, Pachynematus Konow und Nematus Panzer (Hym., Temthredinidae). Deutsche Entomologische Zeitschrift, 21(1/3), pp.1-137.

Prous, M., Liston, A., Kramp, K., Savina, H., Vårdal, H. and Taeger, A., 2019. The West Palaearctic genera of Nematinae (Hymenoptera, Tenthredinidae). ZooKeys, 875, p.63-127