ML41668061
Iceland Gull (Thayer's x Iceland) Larus glaucoides thayeri x glaucoides/kumlieni
作者
Peder Svingen 该用户提供的媒体文件 档案
日期
地点
Duluth--Canal Park
St. Louis, Minnesota, United States
该地点产生的媒体文件 配图名录- 年龄和性别
- 成鸟,性别未知 - X
观察细节
Adult Thayer’s Gull X Kumlien’s [Iceland] Gull at Canal Park, Duluth, Minnesota, 24 Nov 2016. At first glance, the reduced amount of pigment in the wingtip (tiny mark on outer web of p6 and no markings on p5) and less-than-true-black markings on p7-10, suggest Kumlien’s Gull. However, the white mirror on p10 is not terminal, and the white tongue-mirror on p9 does not extend completely across p9 to join the p10 mirror. Up to 20% of the Kumlien’s-type gulls of all ages that we image in the Duluth-Superior area prove to be intergrades.
技术信息
- 型号
- Canon EOS 7D
- 镜头
- EF500mm f/4L IS USM
- ISO
- 1000
- 焦距
- 500 mm
- 闪光
- Flash did not fire, auto
- 光圈
- f/5.6
- 快门速度
- 1/640 sec
- 尺寸
- 4382 pixels x 2921 pixels
- 原始文件大小
- 8.29 MB