The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Bird. Black Headed Mannikins. Caperns Advert Card Birds Feed
Black headed Gull. J. Arthur Dixon. M. I. Smith
Black headed Gull. M. I. Smith. Dixon
Black Headed Gull. J. Arthur Dixon. M. I. Smith
Black Headed Gull. J. Arthur Dixon Ltd. M. I. Smith
British Museum. Natural History. Black Headed Gull. A. Nestling. B. Immature. C. Adult in Winter. D. Adult in Summer. Waterlow. H. Gronvold
British Museum. Natural History. Black Headed Gull. H. Gronvold. Benham and Company. Colchester
Black Headed Gulls and Common Gulls. John Kenney. Edmund Ward
