At 11-16.5mm this is one of the largest Ectemnius species. They are very hard to identify from photographs and a specimen is usually required. The males can sometimes be identified from a good view of the nobbly antennae. The females require an even closer view of the verntral plates and clypeus.
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Brownfield, grassland, hedgerows.
June to October. Double brooded in some years.
Nests in tunnels in dead wood where the adults stockpile paralysed Syrphidae in separate cells on which the larvae feed. Nectars on umbellifers and also takes honeydew.
Widespread across Wales and southern and central England. A scattering of records from Scotland and Northern Ireland.
Common in Leicestershire and Rutland. There were 68 records of this species at the end of 2018.
The fly Macronychia striginervis is an inquiline in the nests of larger Ectemnius species like this.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015