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|first cycle Glaucous x Glaucous-winged Gull||
Figs 1 and 2) It's too early in the season for the primaries to be faded white, as evidenced by the fine subterminal markings, a sign of Glaucous influence. December 22. 1998. Santa Clara County, California. Photos by Mike Rogers.
||Figs 3, 4, and 5) This bird appears as a white-winged Glaucous-winged Gull, which is not unusual late in winter, but this bird is still well-marked in the coverts. Note the bill is intermediate between the two species. Petaluma, California. Photo by Steve Hampton.|
|Fig 6) Another very white, well-patterned gull with a large black bill. Note the patterning has the tan tones often seen in Glaucous Gulls. February 8, 2012. Davis, California. Photo by Steve Hampton.|
|Fig 7) This bird is closer to the Glaucous end of the spectrum, but the bill suggests some Glaucous-winged influence. February 16, 2013. Petaluma, California. Photo by Steve Hampton.|
|Fig 8) This bird appears like a finely-patterned Gl-W Gull, but the patterning in the primaries (with the subterminal arrowhead marks) and the patterned tail suggest Glaucous Gull influence. March 4, 2011. Davis, California. Photo by Steve Hampton.|
|Figs 9 and 10) The head shape seems like Gl-W, but the bill shape favors Glaucous. The bill color is intermediate, and extreme for either in first winter. Because it's March, I'm tempted to say it's a washed-out Gl-W, but this is extreme, and the fine sandy-brown patterning on the coverts and cross-hatching on the scapulars, as well as the white tertials with a few subterm marks, all look very trademark Glaucous to me. The tail shows some paler patterning on the outer halves of the retrices, which is a Glaucous trait. March 14, 1998. Ocean Shores, Washington. Photos by Ryan Shaw.|