ML235444671
作者
Zak Pohlen 该用户提供的媒体文件
日期
地点
Anchorage Coastal WR--Clitheroe flats
Anchorage Municipality, Alaska, 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
*very rare in Southcentral. First found by E. Weiser, and she altered the birding community and a few people were able to arrive in the ~30ish min it was seen for. Timing is appropriate for an overshoot migrant given an impulse of records in SE AK today. Small dark swift with quick wing beats. Silent while I observed the bird. Appeared noticeably smaller than Tree Swallows it was associating with. Obvious Chaetura, and differences from the rarer Chimney Swift is subtle. The undersides appeared lighter gray, without a stark contrast between pale throat and undersides and wings did not appear to bulge in primaries (although can appear bulged when flared during turning) during normal flight.
技术信息
- 型号
- Canon EOS 7D Mark II
- 镜头
- EF400mm f/4 DO IS II USM
- ISO
- 800
- 焦距
- 400 mm
- 闪光
- Flash did not fire, auto
- 光圈
- f/6.3
- 快门速度
- 1/3200 sec
- 尺寸
- 1500 pixels x 900 pixels
- 原始文件大小
- 622.39 KB