Photo © Andy Mitchell
Clostera curtula, the chocolate-tip, is a moth of the family Notodontidae. It was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae and it is found in Europe ranging to Siberia.
The wingspan is 27–35 mm. The moth flies from April to September depending on the location.
The larvae feed on poplar, primarily Populus tremula, and willow.
Source: Wikipedia
The primary larval foodplants are Aspen (Populus tremula), poplars (Populus spp.) and willows (Salix spp.).