ML618054685
作者
日期
地点
- 年龄
- 未说明
- 性别
- 未说明
观察细节
I had initially concluded that this bird was a hybrid Ross's Goose x Snow Goose. I thought that it's bill length was a little bit too long for Ross's Goose, and that this combined with the somewhat concave intersection of it's lateral bill and face indicated hybridization. However, I was unsure because I am insufficiently familiar with the range of variation in either species to know just how far "off" either one of these characteristics can be in a non-hybridized Ross's Goose. I requested advise from individuals more knowledgable about the range of variation in these geese and learned that this bird's characteristics were within the range of variation for Ross's Goose. I am therefore chalking it up to a learning experience and changing the i.d. to Ross's Goose.
技术信息
- 型号
- Canon PowerShot SX740 HS
- 镜头
- 2254417/524283-172mm
- ISO
- 125
- 焦距
- 12.9 mm
- 闪光
- Flash did not fire
- 光圈
- f/4.5
- 快门速度
- 1/500 sec
- 尺寸
- 1462 pixels x 1275 pixels
- 原始文件大小
- 254.88 KB