Thayer’s Gull — Erie, Erie County; December 26, 2004. Photos by Ben Coulter. This photo shows the bird’s pale inner primaries and the slightly more dingy outer primaries. Also note the dark tail.

This photo shows the bird’s primaries, which are darker than the rest of the bird. Also note the light brown breast, patterned mantle, and dark bill.

Again, note the bird’s primaries, which are darker than the rest of the bird. The dark-centered tertials can also be seen here.

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