Ring-billed Gull
Fig 1) This is a heavily marked juvenile. It will become much whiter in the course of the winter. Early October, 1998. South Haven, Michigan. Photo courtesy of Mark Cassino.
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first cycle Ring-billed Gull |
Fig 1) This is a heavily marked juvenile. It will become much whiter in the course of the winter. Early October, 1998. South Haven, Michigan. Photo courtesy of Mark Cassino. |
 
Figs 4 and 5) As a three-year gull, first cycle birds already have adult gray mantles. Photos courtesy of Don DesJardin. |
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Fig 6) A typical late winter bird, probably a female by the petite size. Note the very worn and faded coverts contrasting with the fresh icy blue-gray mantle. March 23, 2011. Clearlake, Calfornia. Photo courtesy of Steve Hampton. |