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Juvenile male Eurasian Sparrowhawk (Accipiter nisus) with interesting eyes - see Description, Lake District National Park, Cumbria, England
Note how the pupil sizes of the two eyes are different: there is more light to the left of the image so the bird's right pupil is constricted (smaller) than the other one. Also the right third eyelid is covering the cornea while the left one is not: the third eyelids must work independently when required. The third eyelids of a Sparrowhawk are just about transparent, so the bird never misses anything!
Photo ID: Juvenile_Male_Eurasian_Sparrowhawk_(Accipiter_nisus)_February_21_0035CrsEsA
Photo size: 10.4 Mpixels (29.6 MB uncompressed) - 3028x3420 pixels (10.1x11.4 in / 25.6x29 cm at 300 ppi)
Photo keywords: Accipiter, animal, animals, Aves, avian, beak, bill, bird, bird of prey, birds, Britain, carnivore, carnivorous bill, Cumbria, DDT, dilate constrict, England, Eurasian, Europe, eye, eyelid, Family Accipitridae, feather, garden, haw, hawk, Kendal, Lake District, Lakeland, Lakes, Lyth, Martin Grace, nares, National Park, native British wildlife, native wildlife, natural history, nature, nisus, nose, nostril, nostrils, Order Accipitriformes, ornithology, plumage, predate, predator, prey, pupil, raptor, Sparrowhawk, third, third eyelid, Thunberg, United Kingdom, wild, wildlife, zoology
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