![](http://www.alamy.com/thumbs/6/D2A08E6B-70BD-4D3D-916A-3363016522FA/BH9G5N.jpg)
Common Shelduck (Tadorna tadorna). Sheldrake or make, showing extended red knob over the bill, a secondary sexual characteristic.
Size: 3561px × 5341px
Photo credit: © Joe Blossom / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: adult, anatinae, animal, animals, anseriformes, background, beak, bill, bird, birds, characteristic, common, copy, detail, drake, duck, ducks, external, face, facial, format, green, gunge, head, heading, identification, knob, male, mandible, nail, nares, nature, orientation, portrait, profile, red, secondary, sexual, sheldrake, shelduck, side, space, tadorna, tadornini, text, title, upper, upright, view, waterfowl, wildfowl, wildlife