ML41214421
Western/Clark's Grebe Aechmophorus occidentalis/clarkii
投稿者
日付
場所
- 年齢と性別
- 成鳥、性別不明 - X
観察結果の詳細
Field notes: Brighter orange bill and slightly less black on the face. Reviewer notes: "The bird in your photo is clearly not a pure Clark's Grebe as the eye is mostly surround above and on the sides by black feathering. A pure Clark's should have the eye completely surrounded by white feathering, thus making it stand out on the face. The fact that your bird appears to have a pretty orangish-yellow bill suggests to me it is a hybrid and likely F2+ backcross between a hybrid and a Western Grebe. It's plumage and head pattern strike me as pretty close to what a typical Western should show, with only the orange-yellow bill being atypical. In this case, I think the most logical way to list this bird would be to put it in as a "Clark's Grebe/Western Grebe, because I don't think there is enough evidence from your photo to identify it positively as a Western or a hybrid."
テクニカル・インフォメーション
- モデル
- Canon PowerShot SX50 HS
- ISO
- 500
- 焦点距離
- 215 mm
- フラッシュ
- Flash did not fire, auto
- Fストップ
- f/6.5
- シャッタースピード
- 1/400 sec
- 大きさ
- 3600 pixels x 2282 pixels
- オリジナルのファイルサイズ
- 1.23 MB