Published in Jour Bombay Nat Hist Soc, in 1952, in volume 50, issue 3, pages 573-593

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Published in Jour Bombay Nat Hist Soc, in 1951, in volume 49, issue 4, pages 695-728

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

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Published in Jour Bombay Nat Hist Soc, in 1953, in volume 51, issue 2, pages 369-377

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Published in Bulletin of The African Bird Club, in 2011, in volume 18, issue 1, pages 83-85

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Published in Raptor Research, in 1981, in volume 15, issue 1, pages 31-32

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Published in Raptor Research, in 1982, in volume 16, issue 2, pages 58-59

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Published in The Wilson Bulletin, in 1931, in volume 43, issue 4, pages 293-305

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Published in Journal of Raptor Research, in 2005, in volume 39, issue 1, pages 103-106

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Published in Raptor Research, in 1976, in volume 10, issue 2, pages 45-49

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Published in Raptor Research, in 1983, in volume 17, issue 3, pages 77-84

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Published in Journal of Raptor Research, in 2005, in volume 39, issue 1, pages 11-18

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Published in Scopus, in 1993, in volume 15, pages 141-163

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Published in Scopus, in 1992, in volume 14, pages 129-158

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Published in Raptor Research, in 1976, in volume 10, issue 3, pages 92-96

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Published in Bulletin of The African Bird Club, in 1999, in volume 6, issue 2, pages 137

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Published in Novitates Zoologicae, in 1928, in volume 34, pages 372-373

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Published in The Auk, in 1919, in volume 36, pages 497-513

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Published in The Wilson Bulletin, in 1926, in volume 38, issue 2, pages 83-91

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Published in Journal of Raptor Research, in 1996, in volume 30, issue 4, pages 240-241

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Published in Journal of Raptor Research, in 1989, in volume 23, issue 3, pages 99-102

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Published in The Wilson Bulletin, in 1929, in volume 41, issue 3, pages 197-198

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Published in The Wilson Bulletin, in 1930, in volume 42, issue 3, pages 222-223

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Published in The Auk, in 1918, in volume 35, pages 373-374

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Published in The Wilson Bulletin, in 1918, in volume 30, issue 1, pages 11-15

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Published in Journal of Raptor Research, in 2000, in volume 34, issue 4, pages 311-318

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Published in Bulletin of The African Bird Club, in 2013, in volume 20, issue 2, pages 205-207

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Published in The Auk, in 1897, in volume 14, pages 227-228

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Published in The Auk, in 1914, in volume 31, pages 137

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Published in Bulletin of The British Ornithologists' Club, in 1969, in volume 89, pages 33-35

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Published in The Auk, in 1913, in volume 30, pages 438-439

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Published in Western Australian Naturalist, in 1954, in volume 4, issue 6, pages 142-144

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Published in The Wilson Bulletin, in 1925, in volume 37, issue 2, pages 95-98

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Published in Ibis, in 1916, in volume 4, issue 2, pages 295-305

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Published in Scopus, in 1978, in volume 2, pages 35-39

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

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Published in Northern Territory Naturalist, in 1992, in volume 13, pages 16-24

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Published in Journal of Raptor Research, in 1994, in volume 28, issue 4, pages 220-225

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Published in Notes From The Leyden Museum, in 1911, in volume 34, issue 1, pages 55-58

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Published in Western Australian Naturalist, in 1967, in volume 10, issue 7, pages 151-153

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

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

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Published in The Auk, in 1913, in volume 30, pages 147-149

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Published in The Wilson Bulletin, in 1931, in volume 43, issue 3, pages 223

Created: 2016-11-27, modified: 2016-11-27

Published in Bulletin of The African Bird Club, in 2011, in volume 18, issue 1, pages 68-73

Created: 2021-02-23, modified: 2021-02-23

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

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Published in Forktail, in 1998, in volume 13, pages 33-68

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

Published in Journal of Raptor Research, in 1994, in volume 28, issue 1, pages 63

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

Created: 2013-03-08, modified: 2013-03-08

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

Created: 2012-12-03, modified: 2012-12-03