Opinions from H. Howard 1972
- 'Anabernicula belongs to Tadorninae'
- 'Anabernicula gracilenta belongs to Anabernicula' according to Ross 1935
- 'Anabernicula gracilenta belongs to Anabernicula'
- 'Anabernicula oregonensis belongs to Anabernicula'
- 'Anabernicula oregonensis belongs to Anabernicula' according to Howard 1964
- 'Anatidae belongs to Anseriformes'
- 'Anatinae belongs to Anatidae'
- 'Anser belongs to Anserinae'
- 'Anser condoni belongs to Anser'
- 'Anseriformes belongs to Aves'
- 'Anserinae belongs to Anatidae'
- 'Ardea belongs to Phalacrocoracidae'
- 'Ardea paloccidentalis belongs to Ardea'
- 'Ardeiformes belongs to Aves'
- 'Branta belongs to Anserinae'
- 'Branta dickey belongs to Branta' according to Miller 1924
- 'Branta minuscula belongs to Branta'
- 'Branta propinqua belongs to Branta'
- 'Brantadorna belongs to Tadorninae'
- 'Bucephala belongs to Merginae'
- 'Bucephala fossilis belongs to Bucephala'
- 'Chendytes belongs to Merginae'
- 'Chendytes lawi belongs to Chendytes'
- 'Chendytes milleri belongs to Chendytes' according to Howard 1955
- 'Ciconia belongs to Ciconiidae'
- 'Ciconia maltha belongs to Ciconia'
- 'Ciconiidae belongs to Ardeiformes'
- 'Colymbus belongs to Podicipedidae'
- 'Colymbus subparvus belongs to Colymbus'
- 'Cygninini was reranked as the subfamily Cygninae and belongs to Anatidae'
- 'Cygnus belongs to Cygninae'
- 'Cygnus (Olor) was reranked as Olor and belongs to Cygninae'
- 'Cygnus paloregonus belongs to Cygnus' according to Cope 1878
- 'Cygnus paloregonus belongs to Cygnus'
- 'Cyphornithidae belongs to Pelecaniformes'
- 'Diomedea belongs to Diomedeidae'
- 'Diomedea californica belongs to Diomedea'
- 'Diomedea milleri belongs to Diomedea'
- 'Diomedeidae belongs to Procellariiformes'
- 'Elopterygidae belongs to Pelecaniformes'
- 'Elopteryx belongs to Elopterygidae'
- 'Elopteryx nopcsai belongs to Elopteryx'
- 'Eremochen russelli belongs to Eremochen' according to Howard 1966
- 'Fulmarus belongs to Procellariidae'
- 'Fulmarus hammeri belongs to Fulmarus'
- 'Gavia belongs to Gaviidae'
- 'Gavia concinna belongs to Gavia'
- 'Gavia howardae belongs to Gavia'
- 'Gaviidae belongs to Gaviiformes'
- 'Gaviiformes belongs to Aves'
- 'Graculus belongs to Phalacrocoracidae'
- 'Graculus macropus belongs to Graculus' according to Cope 1878
- 'Graculus macropus belongs to Graculus'
- 'Jabiru belongs to Ciconiidae'
- 'Megapaloelodus connectens belongs to Megapaloelodus'
- 'Megapaloelodus opsigonus belongs to Megapaloelodus' according to Brodkorb 1961
- 'Megapaloelodus opsigonus belongs to Megapaloelodus'
- 'Mergini was reranked as the subfamily Merginae and belongs to Anatidae'
- 'Miosula belongs to Sulidae'
- 'Miosula media belongs to Miosula'
- 'Miosula recentior belongs to Miosula'
- 'Moris reyana belongs to Moris'
- 'Morus is corrected as Moris and belongs to Sulidae'
- 'Morus vagabundus [misspelled as Moris vagabundus] belongs to Morus'
- 'Mycteria belongs to Ciconiidae'
- 'Mycteria wetmorei belongs to Mycteria' according to Howard 1935
- 'Mycteria wetmorei belongs to Mycteria'
- 'Nettion belongs to Anatinae'
- 'Nettion bunkeri belongs to Nettion'
- 'Olor matthewi belongs to Olor'
- 'Olor matthewi belongs to Olor' according to Schufeldt 1913
- 'Osteodontornis belongs to Pseudodontornithidae'
- 'Osteodontornis orri belongs to Osteodontornis'
- 'Oxyura belongs to Oxyurinae'
- 'Oxyura bessomi belongs to Oxyura'
- 'Oxyurinae belongs to Anatidae'
- 'Palaeochenoides belongs to Cyphornithidae'
- 'Palaeochenoides miocaenus belongs to Palaeochenoides'
- 'Paloelodidae [misspelled as Palaelodidae] belongs to Phoenicopteriformes'
- 'Pelecaniformes belongs to Aves'
- 'Phalacrocoracidae belongs to Pelecaniformes'
- 'Phalacrocorax belongs to Phalacrocoracidae'
- 'Phalacrocorax femoralis belongs to Phalacrocorax'
- 'Phalacrocorax goletensis belongs to Phalacrocorax' according to Howard 1965
- 'Phalacrocorax kennelli belongs to Phalacrocorax'
- 'Phoenicopteridae belongs to Phoenicopteriformes'
- 'Phoenicopteriformes belongs to Aves'
- 'Phoenicopterus minutus belongs to Phoenicopterus'
- 'Phoenicopterus stocki belongs to Phoenicopterus'
- 'Plotopteridae belongs to Pelecaniformes'
- 'Plotopterum belongs to Plotopteridae'
- 'Plotopterum joaquinensis belongs to Plotopterum'
- 'Podicipedidae belongs to Podicipediformes'
- 'Podicipediformes belongs to Aves'
- 'Presbychen belongs to Anatinae'
- 'Presbychen abavus belongs to Presbychen'
- 'Procellariidae belongs to Procellariiformes'
- 'Procellariiformes belongs to Aves'
- 'Pseudodontornis belongs to Pelagornithidae'
- 'Pseudodontornis stirtoni belongs to Pseudodontornis'
- 'Pseudodontornithidae belongs to Pelecaniformes'
- 'Puffinus belongs to Procellariidae'
- 'Puffinus conradi belongs to Puffinus'
- 'Puffinus diatomicus belongs to Puffinus'
- 'Puffinus felthami belongs to Puffinus'
- 'Puffinus inceptor belongs to Puffinus'
- 'Puffinus kanakoffi belongs to Puffinus'
- 'Puffinus mitchelli belongs to Puffinus'
- 'Puffinus priscus belongs to Puffinus'
- 'Puffinus tedfordi belongs to Puffinus'
- 'Sula belongs to Sulidae'
- 'Sula lompocanus is corrected as Sula lompocana and belongs to Sula'
- 'Sula pohli belongs to Sula' according to Howard 1958
- 'Sula pohli belongs to Sula'
- 'Sula stocktoni belongs to Sula' according to Miller 1935
- 'Sula willetti belongs to Sula'
- 'Sulidae belongs to Pelecaniformes'
- 'Tadorninae belongs to Anatidae'
- 'Wasonaka yepomerae belongs to Wasonaka'