Common in open, especially birch, woodland and freshwater margins throughout the British Isles. Widespread and common in Hampshire and the Isle of Wight. Wingspan 10-12 mm. Variable, but only the scarce unicolorous form problematic, being similar to the unicolorous form of A. goedartella, but a deeper, darker colour than A. goedartella. Flies in afternoon sunshine and at night. Larva mines young shoots and catkins of Silver and Downy Birch, and Alder.
The abundance in each month is indicated as follows:
No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time