ML242374851
作者
日期
地点
- 年龄和性别
- 成年雌鸟 - 1; 成年雄鸟 - 1
- 标签
- 生境
媒体文件注释
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.)
观察细节
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.
技术信息
- 型号
- Canon EOS 77D
- 镜头
- EF70-300mm f/4-5.6 IS II USM
- ISO
- 3200
- 焦距
- 300 mm
- 闪光
- Flash did not fire, auto
- 光圈
- f/5.6
- 快门速度
- 1/400 sec
- 尺寸
- 1793 pixels x 1582 pixels
- 原始文件大小
- 630.84 KB