ML52511451
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
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
- 2557 pixels x 1798 pixels
- オリジナルのファイルサイズ
- 715.77 KB