ML128667491
作者
日期
地点
- 年龄
- 未说明
- 性别
- 未说明
观察细节
We believe this bird is likely to be from the Petrochelidon fulva pallida group from Mexico and the southwestern US based on the relatively pale buffy orange coloration of the rump, throat and forehead, as well as the lack of any strong orange or cinnamon coloration in the flanks. These plumage characters were associated with three eastern vagrant specimens determined by mitochondrial haplotype to be from the P.f. pallida group by Engel et al. (2011). Engel et al (2011) further state that "Previous specimen records of vagrant Cave Swallows in eastern North America have primarily been identified as P. f. pallida, including autumn specimens from New York, New Jersey, Ontario, South Carolina, Virginia, and Ohio (McNair and Post 1999, Dinsmore and Farnsworth 2006, Spahn and Tetlow 2006, O'Brien 2007, Post 2008). There are winter specimens from South Carolina of P. f. pallida and an autumn specimen from Missouri in 1977 that was identified by measurements and plumage as P. f. fulva (Easterla 2008)." Comments on subspecific identification welcome. Reference: Engel, J.I., M.H. Hennen, C.C. Witt, and J.D. Weckstein. 2011. Affinities of Three Vagrant Cave Swallows from Eastern North America. The Wilson Journal of Ornithology 123(4): 840-845. -Matthew Sarver and Lauren Morgens
技术信息
- 型号
- NIKON D7000
- ISO
- 640
- 焦距
- 210 mm
- 闪光
- Flash did not fire, auto
- 光圈
- f/6.0
- 快门速度
- 1/2000 sec
- 尺寸
- 554 pixels x 404 pixels
- 原始文件大小
- 30.08 KB