投稿者
日付
場所
- 年齢
- 指定なし
- 性別
- 指定なし
観察結果の詳細
**Rare but surprisingly regular vagrant to Northeastern North America—perhaps even more likely than L.c. canus in this area. The Swampscott-Lynn beaches area has attracted Common Gulls on a number of occasions, sometimes involving multiple gulls of different ssp. The individual seen today and found on Friday (1/26/24) by Suzanne Sullivan falls well within the parameters for L.c. kamtschatschensis i.e. Kamchatka Gull. Features consistent with Kamchatka include: - Somewhat larger bill being slightly more bulbous towards the gonys (compared to L.c. canus). - Bill color greenish-yellow towards the base becoming more yellow post gonys. - The eye is dark but not black. - Fairly extensive head streaking most prominent on the hind-neck. - Slightly darker gray mantle than RBGU, but not excessively so (enough to notice easily but less than expected). - Large tertial crescent contrasting strongly with mantle. - Prominent mirrors on ‘p10’ and ‘p9’ with minute mirrors on ‘p8’ of both wings (smaller on right wing). - Black on outer web of ‘p8’ reaches more than half the way to its coverts. - Black markings on outer web of ‘p4’ (only ~10% of L.c. canus may show this). Overall, the features of this bird are consistent with Kamchatka Gull and present a nice example individual in the continuing saga of northeastern North American Common Gulls. *Of note, I put primaries in quotation marks (e.g. ‘p10’) because it appears that there are 11 primaries on the right wing (10 on the left)—something we’ve never seen before.
テクニカル・インフォメーション
- モデル
- Canon EOS-1D X Mark II
- レンズ
- Canon EF 400mm f/5.6L
- ISO
- 500
- 焦点距離
- 400 mm
- フラッシュ
- Flash did not fire
- Fストップ
- f/6.3
- シャッタースピード
- 1/1000 sec
- 大きさ
- 2904 pixels x 1936 pixels
- オリジナルのファイルサイズ
- 2.45 MB