Cimbex luteus
A large (20 to 28 mm) yellow and brown species very similar to Cimbex connatus. However, C. luteus has significantly more yellow on the body and the thorax is generally a lighter orange colour. Mature larvae are yellow rather than the yellow-green of connatus.
Cimbex connatus which has the basal three tergites mainly black, whereas these are mainly yellow in C. luteus.
Adult and larva 
Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed. If recording the larva please state whether it was found on Alder or Willow.
Where Alders and Willows, the larval food plants occur.
Adult: May to July
Larvae feed on Alders and Willows.
Widespread in England, but very infrequent.
Rarely recorded in Leicestershire and Rutland.
Peter Smith
Cropston, Bradgate Road
07 August 2021
Caldicott
Gibbet Gorse Meadows
01 June 2022
Large Alder Sawfly
Peter Smith
Cropston, Bradgate Road
07 August 2021
Leicestershire & Rutland Map
Enter a town or village to see local records
MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015
UK Map
Species profile
- Species group:
- Sawflies
- Kingdom:
- Animalia
- Order:
- Hymenoptera
- Family:
- Cimbicidae
- Records on NatureSpot:
- 2
- First record:
- 07/08/2021 (Smith, Peter)
- Last record:
- 01/06/2022 (Caldicott, Tim)
Total records by month
% of records within its species group
10km squares with records
The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.
In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.