作者
Ryan O'Donnell 该用户提供的媒体文件 档案
日期
地点
San Diego Pelagic (27Sep15, 7)
San Diego, California, United States
该地点产生的媒体文件 配图名录- 年龄和性别
- 年龄性别未知 - 1
- 行为
- 飞行
观察细节
Leader's list had two unidentified Leach's Storm-Petrels. I (RPO) identified one of those as Townsend's on the basis of photos (12:16 PM) showing long white rump, more than half of tail length (rather than about half of tail length of nominate Leach's), along with small compact body shape and prominent carpal bar reaching front edge of wing (ruling out Wilson's). Rare pale-rumped Chapman's wouldn't have rump this bright. Wedge-rumped Storm-Petrel eliminated mostly by probability and range, but also by apparently long tail fork of this bird and by white rump not reaching close enough to tail tip. I am new to identifying Leach's subspecies, and would appreciate correction if this assessment seems to be in error.
技术信息
- 型号
- NIKON D90
- ISO
- 500
- 焦距
- 400 mm
- 闪光
- Flash did not fire
- 光圈
- f/6.3
- 快门速度
- 1/2500 sec
- 尺寸
- 554 pixels x 368 pixels
- 原始文件大小
- 141.57 KB