Scarce Prominent Odontosia carmelita
Wingspan 38-45 mm.
Inhabiting mature woodland, this local species has a scattered distribution from the south-east of England, through parts of northern England, and in central Scotland and western Ireland.
The thinly-scaled wings are brownish or purplish-grey, with a distinct creamy patch on the front margin.
The adults are on the wing in April and May, and the larvae feed later in the summer on birch (Betula).