ML123638301
作者
日期
地点
- 年龄和性别
- 幼年雄鸟 - X
媒体文件注释
Apparent HY male black-headed grosbeak
观察细节
Apparent HY male (some replacement molt in secondaries and greater coverts). Feeding briefly on sunflower seeds with house finches, only present for a few minutes. Throat and chest very rich tawny, belly and flanks paler tawny, with only a few, faint streaks present on lower flanks, and no sign of rose tints anywhere on the chest. I was unable to view the underwing coverts, but comparisons with specimens (e.g. Remsen, http://losbird.org/jvr_rbgb.html) suggest flank streaking averages much heavier and more extensive on fall HY male rose-breasted grosbeaks. Supercilium was distinctly buffy, not white or whitish as in RBGR (per Pyle 1997). I realize hybrids occur and it may not be possible to eliminate hybridization as a possibility in this bird. Not resighted after initial, brief visit.
技术信息
- 型号
- Canon EOS 7D Mark II
- 镜头
- EF100-400mm f/4.5-5.6L IS II USM
- ISO
- 3200
- 焦距
- 400 mm
- 闪光
- Flash did not fire, auto
- 光圈
- f/6.3
- 快门速度
- 0.02 sec
- 尺寸
- 2432 pixels x 3648 pixels
- 原始文件大小
- 1.82 MB