Loxia leucoptera Gmelin & JF 1789

Coloured figures of the birds of the British Islands / issued by Lord Lilford.. London :R. H. Porter,1885-1897.. biodiversitylibrary.org/page/34517540

Coloured figures of the birds of the British Islands / issued by Lord Lilford.. London :R. H. Porter,1885-1897.. biodiversitylibrary.org/page/43081491

American ornithology; Philadelphia,Carey, Lea & Carey;1825-33. biodiversitylibrary.org/page/58173920

Coloured illustrations of British birds, and their eggs London :G.W. Nickisson,1842-1850. biodiversitylibrary.org/page/40246953

La galerie des oiseaux Paris,Constant-Chantpie,1825-1826. biodiversitylibrary.org/page/58574438

A history of British birds London,Pub. for the author by R.H. Porter [etc.]1883-85. biodiversitylibrary.org/page/13535231

Handbook of the sparrows, finches, etc., of New England Newtonville [Mass.]C. J. Maynard,1896. biodiversitylibrary.org/page/13999502

Skandinaviens fugle,. Kjøbenhavn,L.A. Jørgensen,1875-1879.. biodiversitylibrary.org/page/40094864

The birds of America :. New York :J.B. Chevalier,1840-1844.. biodiversitylibrary.org/page/40384053

A chapter on birds :. London :E. & J.B. Young,1895.. biodiversitylibrary.org/page/37386960

Contributions to the natural history of Alaska.. Washington,Govt. Print. Off.1886.. biodiversitylibrary.org/page/42053981

Field book of wild birds and their music London,G.P. Putnam's Sons[c1921] biodiversitylibrary.org/page/13653772

Naturgeschichte der Vögel Mitteleuropas Gera-Untermhaus,F.E. Köhler,1897-1905 [v.1, 1905] biodiversitylibrary.org/page/34352677