ML242374851
投稿者
日付
場所
- 年齢と性別
- 成鳥メス - 1; 成鳥オス - 1
- タグ
- 生息環境
視聴覚メディア・ノート
Proportions of female (head:wing:tail) are adult; plumage is like juvenile. This may help camouflage her on the nest. My hypothesis is that this behavior may be an efficient way to get food to the nestlings (the male can continue foraging while she carries what he has given her back to the nest). Her plumage may help elicit willingness on the male's part to feed her. (The other 2 places I photographed adult birds with spotted breasts were 5 Islands on 6/3 and Marshlands on 6/8.)
観察結果の詳細
One male feeding what appeared to be an adult female. She followed him like a juvenile and begged, and he fed her repeatedly. See photos. After he fed her 4 x, she disappeared, and I wondered if she had pocketed the food and would pass it on to nestlings. She had plumage like a juvenile, but with long primaries and tail feathers, the third female bird I have seen this week with a spotted breast.
テクニカル・インフォメーション
- モデル
- Canon EOS 77D
- レンズ
- EF70-300mm f/4-5.6 IS II USM
- ISO
- 3200
- 焦点距離
- 300 mm
- フラッシュ
- Flash did not fire, auto
- Fストップ
- f/5.6
- シャッタースピード
- 1/400 sec
- 大きさ
- 1793 pixels x 1582 pixels
- オリジナルのファイルサイズ
- 630.84 KB