ML126497841
Glaucous-winged x Slaty-backed Gull (hybrid) Larus glaucescens x schistisagus
Contributeur
Date
Site d'observation
- Âge et sexe
- Adulte, sexe inconnu - 1
Détails de l'observation
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.).
Espèces additionnelles
Informations techniques
- Modèle
- NIKON D90
- ISO
- 500
- Longueur focale
- 400 mm
- Flash
- Flash did not fire
- f-stop
- f/8.0
- Vitesse d'obturation
- 1/2000 sec
- Dimensions
- 1491 pixels x 1065 pixels
- Taille originale du fichier
- 670.29 KB