A monograph on the anatidae, or duck tribe /.London :Longman, Orme, Brown, Green, & Longman ... and Eddowes, Shrewsbury,1838..biodiversitylibrary.org/page/36002227
Sir William Jardine's illustrations of the duck tribe..Dumfries, N.B. :Privately printed at the expense of the author,[1840?].biodiversitylibrary.org/page/36001900
Bilder-atlas zur Wissenschaftlich-populren Naturgeschichte der Vgel in ihren smmtlichen HauptformenWien,K.K. Hof und Staatsdruckerei,1864. biodiversitylibrary.org/page/33050660Celebrating love 2day. Swans are also famous 4 often forming lifetime mating bonds. Lovely illustration in #bhlib biodiversitylibrary.org/page/33050660