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 The Wilson Bulletin, in 2002, in volume 114, issue 2, pages 165-178

Created: 2016-12-11, modified: 2016-12-11