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Adult: Summer/breeding-Bill black, yellow on mandible at the base; forehead white with black band separated from brown crown by narrow white border; breast band black. Winter/non-breeding-Black replaced by brown. Juvenile: Bill black; forehead tinged pale buff; edge to wings and back buff; breast band usually incomplete. Call: Mournful single long drawn out pe-ou, descending on the second note. Alarm call is an insistent pip. In flight: Faint or no white wingbar and white outer tail feathers. Flight is rapid and low over the ground.