Article source for : Winter gull ID info
A little cheat sheet for identifying gulls that can be seen in our area during the winter. I'm focused on adult gulls right now. Too many plumages exist for the 1 to 3 year old gulls. Will save that learning for another winter.
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<th>gull</th><th>age</th><th>size</th><th>upperside wing</th><th>underside wing</th><th>wing tips</th><th>tail</th><th>head and neck streaking</th><th>bill</th><th>legs</th><th>eyes</th>
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<tr><th>Ring-billed</th><td>adult</td><td>L19" WS48"</td><td>gray</td><td>pale</td><td>black with white spot</td><td>white</td><td>faint and sparse</td><td>yellow with black band</td><td>yellow</td><td>pale</td>
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<tr><th>Herring</th><td>adult</td><td>L25" WS58"</td><td>gray</td><td>pale</td><td>black with white spot</td><td>white</td><td>extensive and dark</td><td>yellow with red spot</td><td>pink</td><td>pale</td>
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<tr><th>Great Black-backed</th><td>adult</td><td>L30" WS65"</td><td>black</td><td>light and dark gray</td><td>black with white spot</td><td>white</td><td>white</td><td>yellow with red spot</td><td>pale pink</td><td>clear yellow to dark</td>
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<tr><th>Lesser Black-backed</th><td>adult</td><td>L23" WS54"</td><td>dark gray</td><td>light gray and gray</td><td>black with small white spot</td><td>white</td><td>extensive and dark</td><td>yellow with red spot</td><td>bright yellow</td><td>clear yellow</td>
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<tr><th>Glaucous</th><td>adult</td><td>L28" WS60"</td><td>faint gray</td><td>nearly all white</td><td>white</td><td>white</td><td>faint and sparse</td><td>yellowish with red spot</td><td>pale pink</td><td>clear yellow</td>
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<tr><th>Iceland</th><td>adult</td><td>L23" WS54"</td><td>light gray</td><td>nearly all white</td><td>white or very little dark gray</td><td>white</td><td>none or faint</td><td>yellow-green with red spot</td><td>pink</td><td>pale yellow to brownish</td>
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<tr><th>Thayer's</th><td>adult</td><td>L23" WS54"</td><td>gray</td><td>white</td><td>some black</td><td>white</td><td>extensive and dark</td><td>yellow-green with red spot</td><td>deep pink</td><td>dark</td>
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<tr><th>Bonaparte's</th><td>adult</td><td>L13" WS32"</td><td>gray with white triangle</td><td>gray with white triangle</td><td>black</td><td>white</td><td>dark ear-spot</td><td>black</td><td>pink</td><td>black</td>
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