Opinions from R. W. Shufeldt 1915
- 'Aletornis bellus belongs to Aletornis'
- 'Aletornis gracilis belongs to Aletornis' according to Marsh 1872
- 'Aletornis gracilis belongs to Aletornis'
- 'Aletornis marshi is recombined as Grus marshi'
- 'Aletornis nobilis belongs to Aletornis'
- 'Aletornis pernix belongs to Aletornis'
- 'Aletornis venustus belongs to Aletornis'
- 'Anas canadensis is recombined as Branta canadensis'
- 'Apatornis belongs to Apatornithidae'
- 'Aquila antiqua is recombined as Minerva antiqua'
- 'Aquila dananus is corrected as Aquila danana and belongs to Aquila' according to Coues 1872
- 'Aquila dananus is corrected as Aquila danana and belongs to Aquila'
- 'Baptornis belongs to Apatornithidae'
- 'Baptornis advenus belongs to Baptornis'
- 'Barornis regens belongs to Barornis'
- 'Botauroides belongs to Ardeidae'
- 'Botauroides parvus belongs to Botauroides'
- 'Bubo leptosteus [misspelled as Bubo leposteus] belongs to Bubo'
- 'Catarractes antiquus is recombined as Uria antiqua'
- 'Cimolopteryx belongs to Apatornithidae'
- 'Cimolopteryx rarus is corrected as Cimolopteryx rara and belongs to Cimolopteryx'
- 'Cimolopteryx retusa belongs to Cimolopteryx'
- 'Colinus eatoni belongs to Colinus'
- 'Colymbus oligocaenus belongs to Colymbus'
- 'Coniornis belongs to Apatornithidae'
- 'Coniornis altus belongs to Coniornis'
- 'Diatryma gigantea belongs to Diatryma'
- 'Eoceornis belongs to Aves'
- 'Eoceornis ardetta belongs to Eoceornis'
- 'Falco falconella belongs to Falco'
- 'Gallinuloides wyomingensis belongs to Gallinuloides'
- 'Gavia pusilla belongs to Gavia'
- 'Graculavus agilis belongs to Graculavus'
- 'Graculavus anceps belongs to Graculavus'
- 'Graculavus lentus belongs to Graculavus'
- 'Graculavus pumilus belongs to Graculavus'
- 'Graculavus velox belongs to Graculavus'
- 'Graculus idahensis belongs to Graculus'
- 'Grus haydeni belongs to Grus'
- 'Hesperornis regalis belongs to Hesperornis'
- 'Ichthyornis celer is recombined as Apatornis celer'
- 'Laornis edvardsianus belongs to Laornis'
- 'Larus pristinus belongs to Larus'
- 'Limicolavis belongs to Aves'
- 'Limicolavis pluvianella belongs to Limicolavis'
- 'Meleagris altus belongs to Meleagris' according to Marsh 1872
- 'Meleagris altus is a subjective synonym of Meleagris superba'
- 'Meleagris richmondi belongs to Meleagris'
- 'Meleagris superbus is corrected as Meleagris superba and belongs to Meleagris'
- 'Palaeophasianus meleagroides belongs to Palaeophasianus'
- 'Palaeotringa littoralis belongs to Palaeotringa'
- 'Palaeotringa vagans belongs to Palaeotringa'
- 'Palaeotringa vetus belongs to Palaeotringa'
- 'Phalacrocorax marinavis belongs to Phalacrocorax'
- 'Phasianus alfhildae belongs to Phasianus'
- 'Phasianus americanus belongs to Phasianus'
- 'Phasianus mioceanus belongs to Phasianus'
- 'Puffinus conradi belongs to Puffinus'
- 'Telmatornis priscus belongs to Telmatornis'
- 'Telmatornis rex belongs to Telmatornis'
- 'Tetrao phasianellus is recombined as Pediocaetes phasianellus'
- 'Tympanuchus lulli belongs to Tympanuchus'
- 'Uintornis lucaris belongs to Uintornis'