Ametastegia equiseti - Redshank Mandrel

Recorded widely across much of mainland Britain to northern Scotland (Musgrove, 2023).

Ametastegia equiseti is the only one in this genus with a red-girdled black body and orange hind femora.

Larvae feed on a variety of herbaceous plants. Larvae of equiseti are similar to Ametastegia glabrata but have a black spot on the dorsum of the anal segment.

Jump to other Ametastegia species

Size: 5.5 - 7mm

GB IUCN Status: Least Concern
GB Rarity Status: None

Distribution: England, Scotland, Wales, Ireland

Flight period: bi- or multivoltine. May to August

Plant associations: Chenopodium album (fat hen), Polygonum persicaria (redshank), Rumex acetosella (sheep's sorrel) and Lythrum salicaria (purple loosestrife).

References:

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 Natural England, unpublished