Published in Bulletin of The British Ornithologists' Club, in 2009, in volume 129, issue 3, pages 191-192
Created: 2015-05-17, modified: 2015-05-17![](https://www.biodiversitylibrary.org/pagethumb/44629380,60,60)
Published in Bonner Zoologische Beiträge, in 1998, in volume 49, pages 131-153
Created: 2014-05-17, modified: 2014-05-17![](https://www.biodiversitylibrary.org/pagethumb/53765677,60,60)
Published in Bulletin of the British Ornithologists' Club, in 2012, in volume 132, issue 4, pages 270-276
Created: 2018-10-08, modified: 2018-10-08![](https://www.biodiversitylibrary.org/pagethumb/45653864,60,60)
Published in Bulletin of The British Ornithologists' Club, in 2008, in volume 128, issue 4, pages 260-263
Created: 2015-08-11, modified: 2015-08-11![](https://www.biodiversitylibrary.org/pagethumb/53765667,60,60)
Published in Bulletin of the British Ornithologists' Club, in 2012, in volume 132, issue 4, pages 260-269
Created: 2018-10-08, modified: 2018-10-08