投稿者
日付
場所
- 年齢
- 指定なし
- 性別
- 指定なし
視聴覚メディア・ノート
Dark-winged Kumlien's Gull originally thought to be possible Thayer's Gull.
観察結果の詳細
Dark-winged Kumlien's Gull originally thought to be possible Thayer's Gull. The bird was foraging atop the hillside with a pair of adult GBBGs and some adult Herring Gulls, which were slightly larger. With wings folded, the primary feather coloration was evidently different from surrounding HERGs. Streaks across face and head forming a hooded appearance. Three species come to mind when trying to identify this gull based on plumage, leg color, size, etc.-- Herring Gull, Thayer's Gull, and dark-winged Kumlien's gull. Oddly-colored HERG can be ruled out by overall size plus bill size/shape. In partially open-winged photo, can count out 4 dark primaries, which also puts this gull within the THGU/Kumlien's category; however, dark primaries appear to be dark gray, rather than black, ruling out THGU and pointing to dark-winged Kumlien's gull. Pale pink legs as opposed to bright pink seen in adult THGU also indicate dark-winged ICGU (Kumlien's).
テクニカル・インフォメーション
- モデル
- Canon EOS 50D
- ISO
- 200
- 焦点距離
- 400 mm
- フラッシュ
- Flash did not fire, auto
- Fストップ
- f/6.3
- シャッタースピード
- 1/2000 sec
- 大きさ
- 1681 pixels x 1356 pixels
- オリジナルのファイルサイズ
- 446.39 KB