ML168851301
作者
Nels Nelson 该用户提供的媒体文件 档案
日期
地点
Dawson Creek Corporate Park
Washington, Oregon, United States
该地点产生的媒体文件 配图名录- 年龄和性别
- 幼鸟,性别未知 - X
观察细节
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.
技术信息
- 型号
- COOLPIX P900
- ISO
- 140
- 焦距
- 250 mm
- 闪光
- Flash did not fire, auto
- 光圈
- f/6.3
- 快门速度
- 1/500 sec
- 尺寸
- 4564 pixels x 2506 pixels
- 原始文件大小
- 4.82 MB