Published in Forktail, in 1998, in volume 14, pages 13-16

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

Published in Bulletin of The British Ornithologists' Club, in 1996, in volume 116, pages 251-253

Created: 2012-12-02, modified: 2012-12-02

Published in Bulletin of The British Ornithologists' Club, in 2006, in volume 126, pages 207-211

Created: 2012-12-02, modified: 2012-12-02