ML35895491
- 性別與年齡
- 幼鳥,性別未知 - X
影音備註
Juvenile Ring-billed Gull. The dark pointed anchor tips within the wing covert feathers are the clinching ID for juvenile Ring-billed Gull. A Mew Gull would have paler rounded internal pattern, Thus, despite the tiny bill, this is a Ring-billed Gull. I chose this photo just so I could show how this field mark positively identifies this bird in an unexpected way. ["A method for separating juvenal and first-winter ring-billed gulls (Larus delawarensis) and common gulls (Larus canus)," Anthony J. Lauro and Barbara J. Spencer, American Birds, March 1980 pp 111-117 (available online on SORA: https://sora.unm.edu/sites/default/files/journals/nab/v034n02/p00111-p00117.pdf)] ["ID Problem: Mew and Ring-billed Gulls," Greg Neise, North American Birding blog, December 23, 2011. (available online at: http://www.nabirding.com/2011/12/23/id-problem-mew-and-ring-billed-gulls/)]
技術資訊
- 型號
- Canon EOS DIGITAL REBEL XTi
- ISO
- 400
- 焦距
- 400 mm
- 閃光
- Flash did not fire, auto
- 光圈值
- f/7.1
- 快門
- 1/3200 sec
- 次方
- 1200 pixels x 900 pixels
- 原始檔案大小
- 171.78 KB