作者
日期
地点
- 年龄
- 未说明
- 性别
- 未说明
观察细节
**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.
技术信息
- 型号
- iPhone 15 Pro
- 镜头
- iPhone 15 Pro back triple camera 6.86mm f/1.78
- ISO
- 50
- 焦距
- 6.9 mm
- 闪光
- Flash did not fire
- 光圈
- f/1.8
- 快门速度
- 1/121 sec
- 尺寸
- 5712 pixels x 4284 pixels
- 原始文件大小
- 2.6 MB