ML114441921
Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescens
投稿者
Alex Lamoreaux 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
Shearwater Journeys_24/08/18_Leg 4/6
Monterey, California, United States
この場所の視聴覚メディア 図解チェックリスト- 年齢と性別
- 成鳥、性別不明 - 1
- 行動
- 飛んでいる
観察結果の詳細
Very early and unexpected. Identified in the field as a Herring (light mantle, light eye, pink legs, dark primaries), but reviewing downloaded photos revealed a very Thayer's-like (Iceland) primary pattern, both on the upperwing and underwing, which HERG x GWGU can also have. The wing pattern rules out a pure HERG. Brightening and saturating a closeup of the head (attached here) shows an orangish orbital ring - this should be red or purple (or inbetween) on ICGU, which is a more unlikely species in my opinion. Bill structure appears to fit better a hybrid better than ICGU, and overall size seemed fairly typical of HERG (and thus HERG x GWGU, which average larger than ICGU) compared to the WEGUs and CAGUs that were also in the chum line.
テクニカル・インフォメーション
- モデル
- Canon EOS 7D
- レンズ
- EF100-400mm f/4.5-5.6L IS II USM
- ISO
- 400
- 焦点距離
- 248 mm
- フラッシュ
- Flash did not fire, auto
- Fストップ
- f/5.6
- シャッタースピード
- 1/2000 sec
- 大きさ
- 4118 pixels x 2748 pixels
- オリジナルのファイルサイズ
- 2.54 MB