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juvenile Thayer's Gull
	Fig 1) Note the checkered upperparts, including the greater coverts, the patterning on the tertial tips, and the dark brown (not black) folded primaries with pale crescents formed by their pale tips. Dec 21, southern Calif. Photo by Don DesJardin, copyright 1998.

Fig 2) This one has exceptionally patterned tertials. Note the smooth brown head. Dec 21, southern Calif. Photo by Don DesJardin, copyright 1998.

Fig 3) This one has tertials almost as dark as the primaries. Note the dove-like head; this may be a female. That's a first year Glaucous-winged in the rear left and Western Gulls immediately behind and on the right. Late November, southern Calif. Photo by Don DesJardin, copyright 1998.

Fig 4) Note the dark brown tail with some white marks at the base of the retrices. March 22, Santa Barbara, CA. Photo by Don DesJardin, copyright 1998.

Fig 5) Here's a really well-patterned bird. Note the touch of pale in the bill, which is uncommon but not extremely unusual. This bird is oiled above the left leg. Dec 2, southern Calif. Photo by Don DesJardin, copyright 1998.