4 Free Images of Cygnus Columbianus Bewickii (illustrations)

British birds BHL43051580, Archibald Thorburn
british birds by archibald thorburncygnus columbianus (illustrations)
PJ Selby03, Prideaux John Selby
cygnus columbianus (illustrations)prideaux john selby
GouldBirdsEuropeVBewicks Swan, 1837
cygnus columbianus bewickii (illustrations)the birds of europe (gould) volume 5
Illustrations of the American ornithology of Alexander Wilson and Charles Lucian Bonaparte - with the addition of numerous recently discovered species and representations of the whole sylvae of North (14769466153), Alexander Wilson, 1835
illustrations of the american ornithology of alexander wilson and charles lucian bonapartecygnus columbianus bewickii (illustrations)
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