Opinions from R. W. Shufeldt 1891
- 'Aechmophorus belongs to Pygopodes'
- 'Aix belongs to Anseres'
- 'Anas belongs to Anseres'
- 'Anas acuta is recombined as Dafila acuta'
- 'Anas islandica is recombined as Glaucionetta islandica'
- 'Anser belongs to Anseres'
- 'Anser condoni belongs to Anser'
- 'Aquila belongs to Accipitres'
- 'Aquila pliogryps belongs to Aquila'
- 'Aquila sodalis belongs to Aquila'
- 'Ardea belongs to Herodiones'
- 'Ardea paloccidentalis belongs to Ardea'
- 'Aythya belongs to Anseres'
- 'Branta belongs to Anseres'
- 'Branta propinqua belongs to Branta'
- 'Bubo belongs to Striges'
- 'Chen belongs to Anseres'
- 'Clangula belongs to Anseres'
- 'Colymbus belongs to Pygopodes'
- 'Corvus belongs to Passeres'
- 'Corvus annectens belongs to Corvus'
- 'Cygnus (Olor) was reranked as Olor and belongs to Anseres'
- 'Dafila belongs to Anseres'
- 'Fulica belongs to Paludicolae'
- 'Fulica minor belongs to Fulica'
- 'Glaucionetta belongs to Anseres'
- 'Herodiones belongs to Aves'
- 'Hydrochelidon belongs to Longipennes'
- 'Larus belongs to Longipennes'
- 'Larus oregonus belongs to Larus'
- 'Larus robustus belongs to Larus'
- 'Longipennes belongs to Aves'
- 'Lophodytes belongs to Anseres'
- 'Odontoglossae belongs to Aves'
- 'Palaeotetrix belongs to Gallinae'
- 'Palaeotetrix gillii belongs to Palaeotetrix'
- 'Paludicolae belongs to Aves'
- 'Pediocaetes belongs to Gallinae'
- 'Pediocaetes nanus belongs to Pediocaetes'
- 'Pelecanus belongs to Steganopodes'
- 'Phalacrocorax belongs to Steganopodes'
- 'Phalaropus belongs to Limicolae'
- 'Phoenicopterus belongs to Odontoglossae'
- 'Phoenicopterus copei belongs to Phoenicopterus'
- 'Podiceps holbollii is recombined as Colymbus holbellii'
- 'Podiceps occidentalis is recombined as Aechmophorus occidentalis'
- 'Podilymbus belongs to Pygopodes'
- 'Pygopodes belongs to Aves'
- 'Scolecophagus belongs to Passeres'
- 'Scolecophagus affinis belongs to Scolecophagus'
- 'Spatula belongs to Anseres'
- 'Sterna belongs to Longipennes'
- 'Sterna nigra is recombined as Hydrochelidon nigra'
- 'Striges belongs to Aves'
- 'Tympanuchus belongs to Gallinae'
- 'Xema belongs to Longipennes'