Summary[edit] Description: Bewick’s Swan Cygnus columbianus head at Slimbridge Wildfowl and Wetlands Centre, Gloucestershire, England. Photographed by Adrian Pingstone in September 2006 and placed in the public domain. Date: 8 September 2006 (according to Exif data). Source: Own work. Author: Arpingstone.
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
Description: Bewick's Swan, Jan. 2006, Saitama JAPAN ; Japanese description:コハクチョウ 2006年1月 埼玉県川本町 (投稿者自身による撮影). Date: 8 January 2006. Source: photo taken by Maga-chan. Author: Maga-chan. Permission(Reusing this file): Maga-chan put it under the Cc-by-sa.
Bewick's Swan, Cygnus columbianus One of 300 or so birds of this species counted on the Slimbridge site February 2010. The other bird is a Black-headed Gull (Chroicocephalus ridibundus) in winter plumage.