"British Ornithologists' Union" . . "Ornithologists' Union" . . "British Ornithological Union" . "MBOU" . . "MBOU" . . . "BOU" . . "Ornithological research" . . . . . . "British Ornithologists' Union Records Committee" . "BOU" . . "Gold Medal of the British Ornithologists' Union" . . . "British Ornithologists\u2019 Union" . . . "M.B.O.U." . "British Ornithologists' Union (BOU)" . . . . . "British Ornithologists' Union" . "HMBOU" .