Empria candidata - Pied Dawn-treader

The species has been recorded sparingly throughout much of mainland Britain. Although relatively straightforward to identify (compared with most of this genus), recent records have been very sparse, with one in Norfolk in 2021 the first for over a decade (Musgrove, 2023).

A black sawfly with pairs of white patches on tergites 2 to 5 (or to 7). Head with white inner and outer eye orbits. In the female, the clypeus, genae and mesopleura pale marked as are the apical margins of the tergites.

Empria candidata larvae feed on birches.

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Size: 6 - 8mm

GB IUCN Status: Vulnerable
GB Rarity Status: None

Distribution: England, Scotland, Wales

Flight period: May to June

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. https://doi.org/10.3897/BDJ.2.e1168

Musgrove, A.J. 2023. A review of the status of sawflies of Great Britain - Phase 2: The Athaliidae and the Tenthredinidae (excluding Nematinae). Natural England, unpublished

Prous, Marko & Heidemaa, Mikk & Soon, Villu. (2011). Empria longicornis species group: Taxonomic revision with notes on phylogeny and ecology (Hymenoptera, Tenthredinidae). Zootaxa. 2756. 1-39. 10.11646/zootaxa.2756.1.1.