ML482616231
投稿者
Scott Ray この投稿者による視聴覚メディア プロフィール
日付
場所
Hummingbird House - Stanley Home
Mountrail, North Dakota, United States
この場所の視聴覚メディア 図解チェックリスト- 年齢
- 指定なし
- 性別
- 指定なし
観察結果の詳細
This bird first appeared yesterday and was identified as Selasphorus sp. After sifting through hundreds of photos looking for some that might show any of the published clues used to separate the two nearly identical species, Rufous and Allen's Hummingbird, I am fairly confident that this is a Rufous. Many of the field marks are extremely subtle. Allen's trademark pin-shaped R5 feather only occur in the adult male. So being an imm bird adds to the identification difficulty. I believe it is an imm male. Separating the two species is all in the tail feathers, particularly their shapes. The slight dent in the lateral vein of R2 seems to be the only diagnostic indication of a Rufous instead of Allen's at this age.
テクニカル・インフォメーション
- モデル
- Canon EOS R5
- レンズ
- RF800mm F11 IS STM + EXTENDER RF1.4x
- ISO
- 20000
- 焦点距離
- 1120 mm
- フラッシュ
- Flash did not fire
- Fストップ
- f/16.0
- シャッタースピード
- 1/800 sec
- 大きさ
- 3539 pixels x 2366 pixels
- オリジナルのファイルサイズ
- 2.72 MB