File:Abbott thayer countershading.jpg

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current20:36, 5 November 2012Thumbnail for version as of 20:36, 5 November 2012870 × 586 (281 KB)commons>Episcophagus{{Information |Description ={{en|1=A photograph of two model ducks, the right countershaded and camouflaged and the left just camouflaged.}} |Source =Thayer G.H 1908 The concealing colouration of animals: new light on an old subject. Century...

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