ML615060768
作者
日期
地点
- 年龄
- 未说明
- 性别
- 未说明
观察细节
Regularly occurs here. There was a mixed flock of AMCR and FICR in the parking lot and on top of the Dick's Sporting Goods and Marc's Grocery buildings. Then they started mobbing a Cooper’s Hawk. A few minutes later, the hawk and all the crows flew off over the buildings, heading southwest. I'm just guessing at the numbers for each species, but although I clearly heard both, it sounded like there were more AMCR (or at least the AMCR were being more vocal). When the flock was in flight, a handful of the birds seemed noticeably smaller than the rest, although I admit I usually cannot discern the size difference visually. The admittedly bad photos attached were the only ones I could snag of a bird while it was giving the FICR call. (For the most part, I was hearing both calls but unable to tell which individuals were giving each call.)
技术信息
- 型号
- Canon PowerShot SX70 HS
- 镜头
- 3.8-247mm
- ISO
- 250
- 焦距
- 247 mm
- 闪光
- Flash did not fire
- 光圈
- f/8.0
- 快门速度
- 1/2000 sec
- 尺寸
- 5184 pixels x 3888 pixels
- 原始文件大小
- 2.24 MB