Published in Bulletin of The British Ornithologists' Club, in 2010, in volume 130, issue 3, pages 154-165

Created: 2015-05-17, modified: 2015-05-17

Published in Bulletin of The British Ornithologists' Club, in 2010, in volume 130, issue 3, pages 181-207

Created: 2015-05-17, modified: 2015-05-17

Published in Forktail, in 2014, in volume 30, pages 143-145

Created: 2019-05-12, modified: 2019-05-12

Published in Bulletin of the British Ornithologists' Club, in 2011, in volume 131, issue 2, pages 94-102

Created: 2018-10-08, modified: 2018-10-08

Published in Bulletin of the British Ornithologists' Club, in 2010, in volume 130, issue 3, pages 166-180

Created: 2015-05-17, modified: 2015-07-13