Alders (Alnus species) are used as food plants by the larvae of a number of Lepidoptera species:
Species which feed exclusively on Alnus:
Species which feed on Alnus among other plants:
Alders are trees comprising the genus Alnus in the birch family Betulaceae. The genus comprises about 35 species of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few species extending into Central America, as well as the northern and southern Andes.
Alnus incana, the grey alder or speckled alder, is a species of multi-stemmed, shrubby tree in the birch family, with a wide range across the cooler parts of the Northern Hemisphere. Tolerant of wetter soils, it can slowly spread with runners and is a common sight in swamps and wetlands. It is easily distinguished by its small cones, speckled bark and broad leaves.
The grey dagger is a moth of the family Noctuidae.
Bucculatrix cidarella is a moth of the family Bucculatricidae. It is found in most of Europe, Kazakhstan and Japan (Honshu). It was described in 1839 by Philipp Christoph Zeller.