This species cannot be readily distinguished as an adult from the Dark Dagger, A. tridens, except by examination of the genitalia. The larvae are, however, quite different.
Pupates in a crevice in tree bark.
Woodland, fens and gardens.
Recorded in 1 (0.4%) of the 270 2km squares of Baden-Württemberg.
Last recorded in July 2016
Recorded date range (Larva/Leafmine): 13 July to 17 July