ML61615401
作者
日期
地点
- 年龄和性别
- 未成年性别未知 - X
观察细节
Very worn first-summer individual actively moulting in second-generation inner primaries, photographed in gull flock on rice fields alongside many Lesser Black-backed and several Yellow-legged Gulls. First seen by Helder Cardoso, who drew attention to its smaller size than congeners. When I examined my photos subsequently, I believed the structure and white-headed, 'snouty' appearance favoured Audouin's over e.g. a worn and bleached first-summer Mediterranean Gull, while the brown greater coverts eliminated Common Gull (with Ring-billed ruled out on a number of features). The 'piano-key' tail pattern appeared somewhat unusual and not to my knowledge a typical feature of any likely species, but subsequent discussion of this bird on the Western Palearctic Gulls Facebook group generated a link to images of an Audouin's with a similar tail pattern (see http://www.elisanet.fi/hj.koskinen/2kvLaraud20080627.html). In summary, no single feature of this bird is wrong for Audouin's, while all potential confusion species can be ruled out on one or more characters visible in the accompanying photos.
技术信息
- 型号
- Canon EOS 7D Mark II
- 镜头
- EF100-400mm f/4.5-5.6L IS II USM
- ISO
- 400
- 焦距
- 400 mm
- 闪光
- Flash did not fire, auto
- 光圈
- f/5.6
- 快门速度
- 1/2500 sec
- 尺寸
- 1000 pixels x 666 pixels
- 原始文件大小
- 458.72 KB