17.03.17 starr ranch-22 : 無料・フリー素材/写真
17.03.17 starr ranch-22 / emiliechenphotography
| ライセンス | クリエイティブ・コモンズ 表示-改変禁止 2.1 |
|---|---|
| 説明 | Another interesting thing I learned is that, for some sexually dimorphic bird species, winglength may help determine the bird's sex. (Males have longer wings.. or was it the other way around?)I didn't really know much about bird-banding until this visit to Starr Ranch. Ornithologist Kayla Baker thoroughly explained how to process birds - taking their measurements and attaching a small metal band, issued by USGS, to one of their legs. Typically, this process (including measuring wing length, determining age and sex especially for sexually dimorphic species, weighing, and banding) takes just 1 minute for a seasoned ornithologist. The short handling time helps reduce the stress on the bird. |
| 撮影日 | 2017-03-17 10:39:58 |
| 撮影者 | emiliechenphotography , Portland, OR, USA |
| タグ | |
| 撮影地 | |
| カメラ | Canon EOS 7D , Canon |
| 露出 | 0.002 sec (1/640) |
| 開放F値 | f/6.3 |
| 焦点距離 | 450 mm |