Opinions from D. A. Guthrie 1992

  • 'Accipitridae belongs to Falconiformes'
  • 'Aechmophorus belongs to Podicipedidae'
  • 'Alauda alpestris belongs to Alauda' according to Linnaeus 1759
  • 'Alauda alpestris is recombined as Eremophila alpestris'
  • 'Alaudidae belongs to Passeriformes'
  • 'Alca antiqua is recombined as Synthliboramphus antiquus'
  • 'Alca antiqua belongs to Alca' according to Gmelin 1789
  • 'Alcidae belongs to Charadriiformes'
  • 'Anas caerulescens is recombined as Chen caerulescens'
  • 'Anas canadensis is recombined as Branta canadensis'
  • 'Anas fusca is recombined as Melanitta fusca'
  • 'Anas perspicillata is recombined as Melanitta perspicillata'
  • 'Anatidae belongs to Anseriformes'
  • 'Anseriformes belongs to Aves'
  • 'Ardea belongs to Ardeidae'
  • 'Ardea herodias belongs to Ardea'
  • 'Ardeidae belongs to Ciconiiformes'
  • 'Asio belongs to Strigidae'
  • 'Asio priscus belongs to Asio' according to Howard 1964
  • 'Asio priscus belongs to Asio'
  • 'Brachyramphus hypoleucus is recombined as Synthliboramphus hypoleucus'
  • 'Brachyramphus hypoleucus belongs to Brachyramphus' according to Pallas 1811
  • 'Branta belongs to Anatidae'
  • 'Carbo penicillatus is recombined as Phalacrocorax penicillatus'
  • 'Cepphus belongs to Alcidae'
  • 'Cepphus columba belongs to Cepphus'
  • 'Charadriiformes belongs to Aves'
  • 'Charadrius belongs to Scolopacidae'
  • 'Charadrius semipalmatus belongs to Charadrius' according to Bonaparte 1825
  • 'Chen belongs to Anatidae'
  • 'Chendytes belongs to Anatidae'
  • 'Chendytes lawi belongs to Chendytes'
  • 'Ciconiiformes belongs to Aves'
  • 'Colymbus aalge is recombined as Uria aalge'
  • 'Colymbus arcticus is recombined as Gavia arctica'
  • 'Corvidae belongs to Passeriformes'
  • 'Corvus belongs to Corvidae'
  • 'Corvus corax belongs to Corvus'
  • 'Cymochorea homochroa belongs to Cymochorea' according to Coues 1864
  • 'Cymochorea homochroa is recombined as Oceanodroma homochroa'
  • 'Diomedea belongs to Diomedeidae'
  • 'Diomedea albatrus belongs to Diomedea'
  • 'Diomedeidae belongs to Procellariiformes'
  • 'Emberiza leucophrys is recombined as Zonotrichia leucophrys'
  • 'Emberiza leucophrys belongs to Emberiza' according to Forster 1772
  • 'Emberizidae belongs to Passeriformes'
  • 'Eremophila belongs to Alaudidae'
  • 'Falco jamaicensis is recombined as Buteo jamaicensis'
  • 'Falco leucocephalus is recombined as Haliaeetus leucocephalus'
  • 'Falco plancus is recombined as Polyborus plancus'
  • 'Falco sparverius belongs to Falco'
  • 'Falconidae belongs to Falconiformes'
  • 'Falconiformes belongs to Aves'
  • 'Fratercula belongs to Alcidae'
  • 'Fringilla melodia is recombined as Melospiza melodia'
  • 'Fulmarus belongs to Procellariidae'
  • 'Gavia belongs to Gaviidae'
  • 'Gaviidae belongs to Gaviiformes'
  • 'Gaviiformes belongs to Aves'
  • 'Gymnogyps belongs to Vulturidae'
  • 'Haliaeetus belongs to Accipitridae'
  • 'Hydrobatidae belongs to Procellariiformes'
  • 'Laridae belongs to Charadriiformes'
  • 'Larus belongs to Laridae'
  • 'Larus californicus belongs to Larus'
  • 'Larus californicus belongs to Larus' according to Lawrence 1854
  • 'Melanitta belongs to Anatidae'
  • 'Mergus belongs to Anatidae'
  • 'Mergus serrator belongs to Mergus'
  • 'Numenius chihi belongs to Numenius' according to Vieillot 1817
  • 'Numenius chihi is recombined as Plegadis chihi'
  • 'Passeriformes belongs to Aves'
  • 'Pelecanidae belongs to Pelecaniformes'
  • 'Pelecaniformes belongs to Aves'
  • 'Pelecanus occidentalis belongs to Pelecanus' according to Linnaeus 1766
  • 'Pelecanus occidentalis belongs to Pelecanus'
  • 'Phalacrocoracidae belongs to Pelecaniformes'
  • 'Phalacrocorax belongs to Phalacrocoracidae'
  • 'Phalacrocorax pelagicus belongs to Phalacrocorax' according to Pellas 1811
  • 'Phalacrocorax pelagicus belongs to Phalacrocorax'
  • 'Plataleidae [misspelled as Plataliidae] belongs to Ciconiiformes'
  • 'Plegadis belongs to Plataliidae'
  • 'Podiceps belongs to Podicipedidae'
  • 'Podiceps clarkii belongs to Podiceps' according to Lawrence 1858
  • 'Podiceps clarkii is recombined as Aechmophorus clarkii'
  • 'Podiceps nigricollis belongs to Podiceps' according to Brehm 1831
  • 'Podiceps nigricollis belongs to Podiceps'
  • 'Podiceps occidentalis is recombined as Aechmophorus occidentalis'
  • 'Podicipedidae belongs to Podicipediformes'
  • 'Podicipediformes belongs to Aves'
  • 'Polyborus belongs to Falconidae'
  • 'Polyborus prelutosus is recombined as Polyborus plancus prelutosus'
  • 'Procellaria glacialis belongs to Procellaria' according to Linnaeus 1761
  • 'Procellaria glacialis is recombined as Fulmarus glacialis'
  • 'Procellaria grisea is recombined as Puffinus griseus'
  • 'Procellariidae belongs to Procellariiformes'
  • 'Procellariiformes belongs to Aves'
  • 'Ptychoramphus belongs to Alcidae'
  • 'Puffinus belongs to Procellariidae'
  • 'Puffinus opisthomelas belongs to Puffinus' according to Coues 1864
  • 'Puffinus opisthomelas belongs to Puffinus'
  • 'Rissa belongs to Laridae'
  • 'Rissa tridactyla belongs to Rissa'
  • 'Scolopacidae belongs to Charadriiformes'
  • 'Strigidae belongs to Strigiformes'
  • 'Strigiformes belongs to Aves'
  • 'Strix alba is recombined as Tyto alba'
  • 'Synthliboramphus belongs to Alcidae'
  • 'Tyto belongs to Strigiformes'
  • 'Tytonidae belongs to Strigiformes'
  • 'Uria belongs to Alcidae'
  • 'Uria aleutica is recombined as Ptychoramphus aleuticus'
  • 'Vultur californianus is recombined as Gymnogyps californianus'
  • 'Vulturidae belongs to Falconiformes'
  • 'Zonotrichia belongs to Emberizidae'