ML168851301
投稿者
Nels Nelson 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
Dawson Creek Corporate Park
Washington, Oregon, United States
この場所の視聴覚メディア 図解チェックリスト- 年齢と性別
- 幼鳥、性別不明 - X
観察結果の詳細
One of the juvenile BH Cowbirds was located close to the NE corner of the park. The other was located almost directly in front of the library, so they were obviously two different birds, being fed by different Junco parents. Interesting to see Parasitism first hand. It's amazing how hard the Juncos have to work to feed birds much larger than themselves. In neither case did I see juvenile Juncos present, which leads me to surmise that the cowbirds must have hatched first and demanded so much attention of the parents that the Junco eggs may not have hatched. However, I have no empirical evidence to back up this thought.
テクニカル・インフォメーション
- モデル
- COOLPIX P900
- ISO
- 140
- 焦点距離
- 250 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
- 1/500 sec
- 大きさ
- 4564 pixels x 2506 pixels
- オリジナルのファイルサイズ
- 4.82 MB