ML126497841
Glaucous-winged x Slaty-backed Gull (hybrid) Larus glaucescens x schistisagus
Bidragsyter
Dato
Lokalitet
- Age and sex
- Adult, Unknown sex - 1
Observasjonsdetaljer
Photographed at East Landing. Eliminated Vega Herring Gull, because underside of primaries was pale gray (not black). Eliminated "Cook Inlet Gull", because mantle color was darker than Glaucous-winged. Eliminated Slaty-backed Gull because mantle color was too pale (with side-by-side comparison). Eliminated hybrid between Slaty-backed and either Herring Gull (Vega or American), due to pale wingtip underside in adult outer primary feathers. Eliminated Slaty-backed x Glaucous Gull hybrid (not previously recorded?) due to dusky eye, not bright pale, as would be expected from this combination. This hybrid combination has been documented from the Kamchatka Peninsula and from the Commander Islands. A weak supporting point for this identification is that several Kamchatka-area birds have also arrived on the island in recent days (e.g. Terek Sandpiper, Little Stint, Lesser Sand-Plover, Slaty-backed Gulls, etc.).
Additional species
Teknisk informasjon
- Model
- NIKON D90
- ISO
- 500
- Focal length
- 400 mm
- Flash
- Flash did not fire
- f-stop
- f/8.0
- Shutter speed
- 1/2000 sec
- Dimensions
- 1491 pixels x 1065 pixels
- Original file size
- 670.29 KB