ML225425521
作者
Joel Adams 该用户提供的媒体文件 档案
日期
地点
Brush Hollow Reservoir
Fremont, Colorado, United States
该地点产生的媒体文件 配图名录- 年龄
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- 性别
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观察细节
Apparent third-cycle bird, photos. Seen only in flight as it circled above the reservoir for several minutes. I believe it was flying north when we lost it. Basically same size as RBGU that was flying near it. Most obvious field mark was a very dark gray mantle that was almost the same shade as the wingtips. Nearly pure white head, breast, and belly; limited dark splotching in tail, an apparent mark of subadult plumage. Thicker bill and more sloped forehead than RBGU. Other dark-mantled gull species considered, but size and shape fit best with Lesser Black-backed, along with probability of course.
技术信息
- 型号
- COOLPIX P900
- ISO
- 100
- 焦距
- 214 mm
- 闪光
- Flash did not fire, auto
- 光圈
- f/6.3
- 快门速度
- 1/800 sec
- 尺寸
- 1292 pixels x 856 pixels
- 原始文件大小
- 118.92 KB