Common in open woodland, heathland, gardens and freshwater margins throughout the British Isles. Widespread and common in Hampshire but apparently rarer on the Isle of Wight. Wingspan 10-12 mm. Generally a fairly distinctive species, but variable, with plain forms difficult to distinguish from plain forms of A. brockeella, which see. 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