Excavator: Ground. Nests are rarely found, but the species has been observed nesting in small aggregations (G.M. Spooner, pers. comm.). On Dartmoor, Devon, J.P. Field (pers. comm.) found aggregations of 20-30 nests in bare, near vertical faces of roadside edges. He has also encountered nest sites in semi-vertical banks in Tyneside.
Social behaviour unknown.