ML71503411
作者
Joseph Morlan 该用户提供的媒体文件 档案
日期
地点
Presidio--Crissy Field
San Francisco, California, United States
该地点产生的媒体文件 配图名录- 年龄和性别
- 未成年雌鸟 - X
媒体文件注释
Digiscoped with Panasonic DMC-LX5 | Nikon FieldScope III | 30XWA | hand-held (no adapter).
观察细节
Found on Oct 9 by Hugh Cotter. This is an immature female representing the first county record for San Francisco. Identified as female by lack of black mottling on chest, crown feathers buffy with dark shaft streaks, and median coverts light buff lacking rusty tips. Note the long primary projection with four primaries visible past the folded tertials. This helps distinguish McCown's from the similar Chestnut-collared Longspur (Calcarius ornatus).
技术信息
- 尺寸
- 800 pixels x 600 pixels
- 原始文件大小
- 161.39 KB