Angle-striped Sallow Enargia paleacea
Wingspan 40-60 mm.
With two main areas of scattered distribution, in central England and central Scotland, this species also occurs in southern England as an immigrant.
It inhabits heaths and open woodland, and the resident population flies in July and August, the migrants slightly earlier.
The larvae feed on silver birch (Betula pendula) and downy birch (B. pubescens).