{"id":4543,"date":"2012-02-27T06:42:00","date_gmt":"2012-02-27T13:42:00","guid":{"rendered":"http:\/\/www.onthewingphotography.com\/wings\/?p=4543"},"modified":"2021-08-26T17:18:19","modified_gmt":"2021-08-26T23:18:19","slug":"birds-with-blown-eyes","status":"publish","type":"post","link":"https:\/\/www.onthewingphotography.com\/wings\/2012\/02\/27\/birds-with-blown-eyes\/","title":{"rendered":"Birds with “Blown Eyes”"},"content":{"rendered":"

Blown Eyes<\/h2>\n

\"Yellow-crowned\u00a0Yellow-crowned Night Heron (Nyctanassa violacea) composite with blown eye<\/span><\/p>\n

Because I am a bird photographer I get to see and photograph our beautiful feathered friends, learn their habits and behaviors and sometimes I get to take a look at unusual conditions in the birds themselves.<\/p>\n

The Yellow-crowned Night Heron above exhibits what I and other bird photographers have come to call “blown\u00a0eye”.\u00a0 Both of the images are photos of\u00a0the same bird and the right eye frame at the top\u00a0is normal. The second image shows two tear drop shaped black blobs in the iris which is abnormal. I don’t know if this was caused by an injury or if this might be a congenital condition.<\/p>\n

\"AmericanAmerican Oystercatcher (Haematopus palliatus) composite with blown eye<\/span><\/p>\n

While I lived in Florida\u00a0I often noticed “blown eyes” in American Oystercatchers and I have seen it where it was evident in both eyes of adult birds. The juvenile Oystercatchers have dark irises and it\u00a0might be difficult to detect if their eyes are “blown” without getting images that are lit well and close up. These images are of two\u00a0different birds that were a mated pair.<\/p>\n

I recently read about a congenital condition in humans called “iris colobomas”\u00a0which is also found in other mammals and birds and have begun to wonder if that might not be the cause of the abnormal pupils I see in some species of birds instead of an injury to the eye.<\/p>\n

\"Great Great Horned Owl (Bubo virginianus) composite with blown eye<\/span><\/p>\n

\u00a0The top Great Horned Owl (photographed in Utah) in the composite above has normal eyes, the difference in the size of the pupils is caused by the angle of light dilating the pupils differently. The Great Horned Owl (photographed in Montana) shows a left “blown” eye.\u00a0To me it looks like the pupil has leaked into the iris.<\/p>\n

I’ve seen this condition in the species I have shown in my images and I’ve also seen it occur in Bald Eagles.<\/p>\n

None of the birds I have photographed with blown eyes appear to have any difficulty seeing and it doesn’t seem to limit their ability to stalk or hunt prey. The Yellow-crowned Night Heron in the image above stalked, captured and ate three Ghost Crabs while I observed and photographed it. American Oystercatchers probe for their prey and none of the birds with blown eye that I observed exhibited any more difficulty in locating food than the adults nearby that did not have this condition. The Great Horned Owl with the blown eye was a male and the pair had three chicks and I am almost certain he had no difficulties providing food for them.<\/p>\n

I wonder how many other bird species exhibit “blown eyes” and what the cause is. Injury or Congenital Defect. I would love to read additional\u00a0input on this topic so please feel free to comment.<\/p>\n

Life is good.<\/p>\n

Mia<\/p>\n

Click here<\/span><\/a> to see more of my bird photos.<\/p>\n","protected":false},"excerpt":{"rendered":"

I recently read about a congenital condition in humans called “iris colobomas” which is also found in other mammals and birds and have begun to wonder if that might not be the cause of the abnormal pupils I see in some species of birds instead of an injury to the eye.<\/p>\n","protected":false},"author":1,"featured_media":11700,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[19,27,25,704,860,209,12,2000,93],"tags":[3974,1289,4203,1290,1291,1293,4108,22,1292,4000,274,4001,95],"class_list":["post-4543","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-american-oystercatchers","category-avian","category-florida","category-fort-de-soto-county-park","category-glacier-county","category-great-horned-owls","category-montana","category-pinellas-county-florida","category-yellow-crowned-night-heron","tag-american-oystercatcher","tag-blown-eyes","tag-bubo-virginianus","tag-damaged-iris","tag-damaged-pupil","tag-eye-injury","tag-great-horned-owl","tag-haematopus-palliatus","tag-iris-colobomas","tag-nyctanassa-violacea","tag-shorebirds-2","tag-wading-bird","tag-yellow-crowned-night-heron"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t