DGC1073424: US Marines World War One recruitment poster (colour litho) 1914, Flagg, James Montgomery (1877-1960) / Bridgeman Images

DGA1140059: Illustration from John Gould"s "The Birds of Australia" representing Lesser Frigatebird Fregata ariel, by Oscar Dressler, 1840-1848, engraving, Gould, John (1804-81) / Bridgeman Images

DGA1140061: Illustration from John Gould"s "The Birds of Australia" representing Southern Crested Grebe Podiceps cristatus australis, by Oscar Dressler, 1840-1848, engraving, Gould, John (1804-81) / Bridgeman Images

DGA1140064: Close-up of birds of the passeriformes family / Bridgeman Images

DGA1140067: Close-up of a group of birds / Bridgeman Images

DGA1140069: Close-up of a group of birds / Bridgeman Images

DGA1140070: Zoology: Birds, Duck (Anatinae), illustration / Bridgeman Images

DGA1140073: Two griffon vultures (Gyps Fulvus) / Bridgeman Images

DGA1140074: Zoology: Birds, Grey Wagtail (Motacilla cinerea), illustration / Bridgeman Images

DGA1140076: Zoology: Birds, Black-tailed Godwit, (Limosa limosa), illustration / Bridgeman Images

DGA1140077: Zoology: Birds, Black-tailed Godwit, (Limosa limosa) and Black Tern, (Chlidonias niger), illustration / Bridgeman Images

DGA1140088: Zoology: Birds, Little Bustard, (Tetrax tetrax), male and female, illustration / Bridgeman Images

DGA1140098: Zoology: Birds, Ringed Plover (Charadrius hiaticula), illustration / Bridgeman Images

DGA1140100: Zoology: Birds, Eurasian Jay (Garrulus glandarius), illustration / Bridgeman Images

DGA1140102: Zoology: Birds, Common Shag (Phalacrocorax aristotelis), illustration / Bridgeman Images

DGA1140104: Zoology: Birds, Eurasian Eagle Owl (Bubo bubo), European Scops Owl (Otus scops), Eurasian Pygmy Owl, (Glaucidium passerinum) and Tengmalm's Owl, (Aegolius funereus), illustration / Bridgeman Images

DGA1140117: Zoology: Birds, Slender-billed Gull, (Larus genei), illustration / Bridgeman Images

DGA1140126: Zoology: Birds, Hoopoe (Upupa epops), illustration / Bridgeman Images

DGA1140127: Zoology: Birds, Cetti's Warbler, (Cettia cetti), illustration / Bridgeman Images

DGA1140138: Zoology: Birds, Hazel Hen (Bonasa bonasia), illustration / Bridgeman Images

DGA1140143: Zoology: Birds, Mallard (Anas platyrhynchos), illustration / Bridgeman Images

DGA1140148: Zoology: Birds, Mistle Thrush (Turdus viscivorus), illustration / Bridgeman Images

DGA1140151: Zoology: Birds, Red-footed Falcon (Falco vespertinus), illustration / Bridgeman Images

DGA1140152: Zoology: Birds, Ferruginous Duck (Aythya nyroca), illustration / Bridgeman Images

DGA1140153: Zoology: Birds, Ferruginous Duck (Aythya nyroca), illustration / Bridgeman Images

DGA1140154: Zoology: Birds, Northern Lapwing (Vanellus vanellus), illustration / Bridgeman Images

DGA1140162: Zoology: Birds, Savi's Warbler, (Locustella luscinioides), illustration / Bridgeman Images

DGA1140166: Zoology: Birds, Falconiformes, Pallid Harrier (Circus macrourus), Montagu's Harrier (Circus pygargus), Hen Harrier (Circus cyaneus), Western Marsh Harrier (Circus aeruginosus), illustration / Bridgeman Images

DGA1140178: Zoology: Birds, Herring Gull, (Larus argentatus), illustration / Bridgeman Images

DGA1140182: Zoology: Birds, Peregrine Falcon (Falco peregrinus), illustration / Bridgeman Images

DGA1140187: Zoology: Birds, Examples of different orders, illustration / Bridgeman Images

DGA1140195: Close-up of a group of charadriiformes birds / Bridgeman Images

DGA1140199: Close-up of caprimulgiformes / Bridgeman Images

DGA1140212: Close-up of an eagle looking down / Bridgeman Images

DGA1140217: Close-up of an owl's claws reaching for a mouse / Bridgeman Images

DGA1140221: Birds: Passeriformes, Canaries (Serinus canaria): colourbred Canaries, colour mutations, illustration / Bridgeman Images