ML617439520
- 性別與年齡
- 雌成鳥 - 1; 雄成鳥 - 1
影音備註
In this photo you can see that the wingbar is clearly broader than the trailing edge of the speculum.
觀察細節
Adult male with a female. Photos of female speculum clearly show a broader wingbar vs the trailing edge. According to Reeber's (2015) waterfowl book this is probably the best (only?) way to tell female crecca vs. carolinensis. I've never documented a female crecca in the US so open to suggestions from anyone with more experience.
技術資訊
- 型號
- Canon EOS 7D Mark II
- 鏡頭
- EF400mm f/5.6L USM
- ISO
- 320
- 焦距
- 400 mm
- 閃光
- Flash did not fire
- 光圈值
- f/5.6
- 快門
- 1/3200 sec
- 次方
- 1302 pixels x 868 pixels
- 原始檔案大小
- 651.3 KB