Terellia tussilaginis

Formerly placed in the genus Cerajocera (now a subgenus of Terellia): the old RES key has it as Cerajocera tussilaginis. Sometimes known as Banded Burdock Fly.

There were at least 10 of these on Burdock.

Terellia tussilaginis, Hoe Rough (Norfolk, UK), 11th July 2025

I retained one for identification in case it proved impossible to resolve them from photos in the field, and I keyed this one using the RES key.

male Terellia tussilaginis showing head from front and side, thorax from top and side, scutellum and wing, Hoe Rough (Norfolk, UK), 11th July 2025

I had seen this species a few times previously. This female was on Hazel.

female Terellia tussilaginis, Wendling Beck Environment Project (Norfolk, UK), 2nd August 2021

This was one of four on Burdock.

male Terellia tussilaginis, North Elmham Cathedral Meadows (Norfolk, UK), 31st July 2021

This was one of eight on Burdock.

male Terellia tussilaginis, Wendling Beck Environment Project (Norfolk, UK), 13th August 2021

These were two of three on Burdock. I didn't retain any this time but I think the ID is safe given the appearance and the plant they were on (though I'm always happy to be corrected if need be).

2x Terellia tussilaginis, Wendling Beck Environment Project (Norfolk, UK), 18th July 2025