ML52511441
投稿者
Bobby Brown この投稿者による視聴覚メディア プロフィール
日付
場所
Williamsport Dam
Lycoming, Pennsylvania, United States
この場所の視聴覚メディア 図解チェックリスト- 年齢
- 指定なし
- 性別
- 指定なし
視聴覚メディア・ノート
Showing extremely light tail base and dark band
観察結果の詳細
Flew in with about 20 RBGU and 2 HERG near dusk, joining the group of a couple hundred gulls (RBGU and BOGU) already present. Very dark back and light head led me to pay particular attention to the bird. Bill was predominantly black. Size intermediate between RBGU and HERG, which were both present to compare. The bird took flight on a couple occasions, where the mostly white tail base with black tail band were noted. The underside of the body seemed fairly light in contrast to the dark back.
テクニカル・インフォメーション
- 大きさ
- 2322 pixels x 1698 pixels
- オリジナルのファイルサイズ
- 608.11 KB