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Published in The Wilson Bulletin, in 1905, in volume 17, issue 3, pages 84-88

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Authors: R Demey | P Camberlein

Published in Bulletin of The African Bird Club, in 2015, in volume 22, issue 1, pages 86-88

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Published in Ibis, in 1870, in volume 6, issue 4, pages 498

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Authors: Harry C Oberholser

Published in The Wilson Bulletin, in 1917, in volume 29, issue 1, pages 18-29

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Authors: Harry C Oberholser

Published in The Wilson Bulletin, in 1918, in volume 30, issue 2, pages 34-48

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Published in Emu, in 1922, in volume 22, pages 67

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Published in The Auk, in 1919, in volume 36, pages 151-152

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Published in Western Australian Naturalist, in 1969, in volume 11, issue 4, pages 90-97

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Published in The Wilson Bulletin, in 1920, in volume 32, issue 4, pages 103-122

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Authors: Stephanie J Tyler | Richard D Randall | Chris A Brewster

Published in Bulletin of The African Bird Club, in 2008, in volume 15, issue 1, pages 36-52

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Authors: S Brodeur | F Morneau | R Decarie | J J Negro | D M Bird

Published in Journal of Raptor Research, in 1994, in volume 28, issue 4, pages 259-262

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Authors: D F F Thomson

Published in Emu, in 1922, in volume 22, pages 138-140

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Published in The Auk, in 1918, in volume 35, pages 85

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Published in Bulletin of The British Ornithologists' Club, in 1983, in volume 103, pages 77-79

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Authors: D Proud

Published in Journal of The Bombay Natural History Society, in 1958, in volume 55, pages 345-351

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Published in Journal of The Bombay Natural History Society, in 1951, in volume 49, pages 784

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Authors: D M Bird | P C Lague

Published in Raptor Research, in 1976, in volume 10, issue 1, pages 1-8

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Authors: D S Carpenter

Published in Rhodora, in 1907, in volume 9, issue 102, pages 108

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Authors: Thomas D Burleigh

Published in The Wilson Bulletin, in 1923, in volume 35, issue 2, pages 79-99

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Authors: Clive R Barlow | R B Payne | L L Payne | M D Sorenson

Published in Bulletin of The African Bird Club, in 2006, in volume 13, issue 1, pages 45-48

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Authors: N Seddon | D R Capper | J M Ekstrom | I S Isherwood | R Muna | R G Pople | E Tarimo | J Timothy

Published in Bulletin of The African Bird Club, in 1996, in volume 3, issue 2, pages 90-95

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Authors: W R Walton | W R Walton | F H Chittenden | J R Watson

Published in The Auk, in 1917, in volume 34, pages 230-231

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Authors: D T Bell | R C Bell | W A Loneragan

Published in Journal of The Royal Society of Western Australia, in 2007, in volume 90, issue 4, pages 219-227

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Authors: R E Simmons | D M Avery | G Avery

Published in Journal of Raptor Research, in 1991, in volume 25, issue 3, pages 63-67

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