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. 63rd suppl.) |
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Aegolius [acadicus or ridgwayi] | Nyctala acadica Saw-whet Owl |
Nyctala acadica Saw-whet Owl |
Cryptoglaux acadica Saw-whet Owl |
Cryptoglaux acadica Saw-whet Owl |
Aegolius acadicus Saw-whet Owl |
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* Aegolius acadicus | |
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Aegolius acadicus Northern Saw-whet Owl |
Aegolius acadicus Northern Saw-whet Owl |
Aegolius acadicus Northern Saw-whet Owl |
Aegolius acadicus acadicus | |
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Cryptoglaux acadica acadica |
Aegolius acadicus acadicus |
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Aegolius acadicus acadicus (acadicus) | |
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Cryptoglaux acadica acadica |
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[Aegolius acadicus acadicus (brodkorbi)] | |
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[Aegolius acadicus acadicus (scotaea)] | |
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Cryptoglaux acadica scotaea |
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Aegolius acadicus brooksi | |
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Cryptoglaux acadica brooksi |
Aegolius acadicus brooksi |
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* Aegolius ridgwayi← | |
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Aegolius ridgwayi Unspotted Saw-whet Owl |
Aegolius ridgwayi Unspotted Saw-whet Owl |
Aegolius ridgwayi Unspotted Saw-whet Owl |
Aegolius ridgwayi ridgwayi | |
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Aegolius ridgwayi tacanensis | |
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Aegolius ridgwayi rostratus | |
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