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Terns at Muskegon

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I don't know that I can say for sure from these, but for future reference -- at that date and location, if it's got a black crown, it should be a Common. If it's got a largely white head with black eye-patches, it should be a Forster's. If it's as big as the Ring-billed Gulls, it should be a Caspian. Anything else would be a big surprise.

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Forster's actually have larger bills than Commons, and you'll never see this many Arctic or Least in Michigan. So these are most likely Common. (I suppose Black Tern would also be a possibility, but they're quite distinct looking even in the winter.)

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