ML471313551
American Herring x California Gull (hybrid) Larus smithsonianus x californicus
投稿者
日付
場所
- 年齢
- 指定なし
- 性別
- 指定なし
視聴覚メディア・ノート
July 1st bird just right of center with yellow legs. This bird fits in size-wise with other smaller Herring Gulls.
観察結果の詳細
Possible hybrids or backcrosses. One bird frequenting this location with two juveniles, one seen previously on July 1 at a Herring Gull rooftop breeding colony (no young or pair), initially ID'd as CAGU. Description here of July 1st bird, the other bird described on July 26 list. CAGU features: yellow legs, darker upperparts (more subtle than other individual), wingtip pattern, smaller size (larger than other individual, size of medium-small HERG) HERG features: orange orbital ring and gape, slightly paler iris with intricate pattern - both only seen from closeup photos, thus initial ID as CAGU Relatively larger size, larger head, and paler upperparts may be intermediate features but are also associated with California spp. albertaensis.
テクニカル・インフォメーション
- 大きさ
- 1805 pixels x 1116 pixels
- オリジナルのファイルサイズ
- 1.19 MB