ML194855941
- 性別與年齡
- 未成鳥,性別未知 - 1
- 行為
- 飛行中
觀察細節
Small, strikingly black and white terns with small, fine, all black bills. The birds had much darker blackish grey upper surfaces on backs, wings, and tails that other more locally common small terns (Common and Arctic). On some of them, the upper surfaces were not uniformly coloured - they were patchy with darker patches, but all of the feathers on the mantles and wings were darker than those on Common and Arctic Terns. The birds were obviously small (appeared significantly smaller than Common and Arctic Terns) and flew very erratically, dipping and diving in the marsh and among the marsh vegetation. The birds had smudgy, darkish caps on the rear of their crowns and solid, dark marks extending down behind the eyes. They also had some dark smudgy markings extending down onto their flanks/side of their necks and one of them had a blotchy appearance underneath with lots of black feathers mixed in with the white ones on the breast/belly. Seen well from within 30 - 50 m as they foraged in the air overhead of us for several minutes. Photos attached.
技術資訊
- 型號
- Canon EOS 80D
- 鏡頭
- EF100-400mm f/4.5-5.6L IS II USM
- ISO
- 800
- 焦距
- 400 mm
- 閃光
- Flash did not fire, auto
- 光圈值
- f/8.0
- 快門
- 1/2000 sec
- 次方
- 3653 pixels x 2435 pixels
- 原始檔案大小
- 8.98 MB