'Willows, sallows and osiers - Salix spp. - are used as food plants by the larvae (caterpillars) of a large number of Lepidoptera species including the following.
Contents
Monophagous species
Species that feed exclusively on Salix.
Polyphagous species
Species that feed on Salix and other plants.
References
List of Lepidoptera that feed on willows Wikipedia(Text) CC BY-SA