Contribuidor
Fecha
Localidad
- Edad y sexo
- Adulto, sexo desconocido - 1
Detalles de la observación
*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.
Información técnica
- Lens
- RF100-500mm F4.5-7.1 L IS USM
- ISO
- 640
- Focal length
- 500 mm
- Flash
- Flash did not fire
- f-stop
- f/7.1
- Shutter speed
- 1/800 sec
- Dimensions
- 2046 pixels x 1228 pixels
- Original file size
- 1.21 MB