An oligolectic species: Restricted to Onobrychis viciifolia (Fabaceae) in England, Germany and Ukraine but also found on Onobrychis arenaria (Fabaceae) in Hungary.
Michez (2007), listing flower visitation of 87 specimens, reports visits to Onobrychis sp., Onobrychis viciifolia, Onobrychis arenaria, Onobrychis supina (Fabaceae).
A large group of males has been observed roosting on a inflorescence of Echium vulgare (Boraginaceae).