Published in Bulletin of The British Ornithologists' Club, in 1997, in volume 117, pages 237
Created: 2012-12-02, modified: 2012-12-02![](https://www.biodiversitylibrary.org/pagethumb/47499901,60,60)
Published in Bulletin of The British Ornithologists' Club, in 2010, in volume 130, issue 4, pages 277-285
Created: 2015-05-17, modified: 2015-05-17![](https://www.biodiversitylibrary.org/pagethumb/58110246,60,60)
Published in Forktail, in 2012, in volume 28, pages 169-171
Created: 2019-05-12, modified: 2019-05-12![](https://www.biodiversitylibrary.org/pagethumb/58100726,60,60)
Published in Forktail, in 2014, in volume 30, pages 130-131
Created: 2019-05-12, modified: 2019-05-12![](https://www.biodiversitylibrary.org/pagethumb/50795660,60,60)
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![](https://www.biodiversitylibrary.org/pagethumb/58109170,60,60)
Published in Forktail, in 2004, in volume 20, pages 55-62
Created: 2019-05-12, modified: 2019-05-12![](https://www.biodiversitylibrary.org/pagethumb/54902256,60,60)
Published in Records of The Western Australian Museum, in 1996, in volume 18, issue 2, pages 157-178
Created: 2017-11-26, modified: 2017-11-26![](https://www.biodiversitylibrary.org/pagethumb/51359078,60,60)
Published in Journal of Raptor Research, in 2004, in volume 38, issue 4, pages 343-349
Created: 2017-04-07, modified: 2017-04-07![](https://www.biodiversitylibrary.org/pagethumb/58107177,60,60)
Published in Forktail, in 2016, in volume 32, pages 36-40
Created: 2019-05-12, modified: 2019-05-12