投稿者
日付
場所
- 年齢と性別
- 成鳥メス - X
視聴覚メディア・ノート
Photo (c) Kate Warrick
観察結果の詳細
Observer Kate Warrick. This Ruby-throated Hummingbird, present 24 (here) to 26 August, in the wilds 50 km n. of Beaver Creek, Yukon is astonishing given the extremely remote location, and that anyone would consider putting up a hummingbird feeder there. The narrower inner primaries and wider outer primaries help distinguish it from the very similar Anna's Hummingbird. ID analysis from Alvaro Jaramillo It’s a Ruby-throated Hummingbird. Apart from the very pale underparts including a white breast band it lacks the densely spotted throat and grayish underparts of Anna’s, it also looks small and slim based on the fake flower size. But key is the primary structure that you can see on that last photo. The inner primaries are narrower, the outers much wider and almost paddle like. This increasing width of primaries is only seen on Archilochus, and the green back and overall tone is good for Ruby-throated, not Black-chinned."
テクニカル・インフォメーション
- モデル
- DSC-HX200V
- レンズ
- 4.8-144mm f/2.8-5.6
- ISO
- 800
- 焦点距離
- 99.4 mm
- フラッシュ
- Flash did not fire, auto
- Fストップ
- f/5.0
- シャッタースピード
- 1/160 sec
- 大きさ
- 640 pixels x 480 pixels
- オリジナルのファイルサイズ
- 108.08 KB