Species concept | American Ornithologists' Union 1st edition (1886) | American Ornithologists' Union 2nd edition (1895) | American Ornithologists' Union 3rd edition (1910) | American Ornithologists' Union 4th edition (1931) | American Ornithologists' Union 5th edition (1957) | American Ornithologists' Union 6th edition (1983) | American Ornithologists' Union 7th edition (1998) | American Ornithologists' Society 7th edition (incl. 62nd suppl.) |
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* Chlidonias niger← | Hydrochelidon nigra Black Tern |
Hydrochelidon nigra Black Tern |
Hydrochelidon nigra Black Tern |
Chlidonias nigra Black Tern |
Chlidonias niger Black Tern |
Chlidonias niger Black Tern |
Chlidonias niger Black Tern |
Chlidonias niger Black Tern |
Chlidonias niger niger | |
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Chlidonias niger surinamensis | Hydrochelidon nigra surinamensis |
Hydrochelidon nigra surinamensis |
Hydrochelidon nigra surinamensis |
Chlidonias nigra surinamensis |
Chlidonias niger surinamensis |
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