ML352284141
投稿者
日付
場所
- 年齢と性別
- 未成鳥 性別不明 - 1
視聴覚メディア・ノート
Taken by Zane Marshall 7-4-21
観察結果の詳細
Comments by Chris Aquila: Highly unexpected. Bird was first noticed by Zane Marshall and we all subsequently studied and photographed it extensively for approximately 20/25 minutes.Plumage is consistent for an approximate 1 year old (immature plumaged) individual, showing expected/diagnostic white lateral stripe on flanks, and the very beginnings of a few yet noticeable black feathers on lower breast/belly, indicative of the eventual black bars/banding which will become more prominent by late Autumn/early winter. In addition, this individual is within plumage variation range in that not all yearling birds will have developed any noticeable white feathers at the base of the bill - as is the case with this individual. In fact, this specimen is still showing some evidence of a very thin line of "dark feathers at the base of the bill, which is more characteristic of GWFG Juvenile plumage and is usually but not definitively lost before they reach 1 year of age such as this bird. This last point more or less emphasizes the variation in development, which is relatively commonplace in their 1st year natural history.
テクニカル・インフォメーション
- モデル
- E-M1MarkII
- レンズ
- M.40-150mm F2.8 + MC-20
- ISO
- 320
- 焦点距離
- 300 mm
- フラッシュ
- Flash did not fire
- Fストップ
- f/5.6
- シャッタースピード
- 1/500 sec
- 大きさ
- 791 pixels x 910 pixels
- オリジナルのファイルサイズ
- 242.94 KB