ML194855981
投稿者
日付
場所
- 年齢
- 指定なし
- 性別
- 指定なし
- 行動
- 飛んでいる
観察結果の詳細
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.
テクニカル・インフォメーション
- モデル
- Canon EOS 80D
- レンズ
- EF100-400mm f/4.5-5.6L IS II USM
- ISO
- 800
- 焦点距離
- 400 mm
- フラッシュ
- Flash did not fire, auto
- Fストップ
- f/8.0
- シャッタースピード
- 1/1250 sec
- 大きさ
- 4000 pixels x 2667 pixels
- オリジナルのファイルサイズ
- 10.04 MB