Common Tern primary feather, Great Gull Island, New York. Another way roseates are stealthy: they blend in with the commons reeeeally well. They look very very similar. The biggest giveaway is that they have a bit more black on their beaks. Or, if you have a bird in your hand, you can compare flight feathers. See the "V" shape of black that opens out from the tip of the common feathers? Roseates don't have that, only a stripe of black to the leading edge. I say this as if I were confident that I could be trusted to successfully ID any individual specimen. I'm not... they're REALLY similar-looking.
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: rotate and crop. The original can be viewed here: Tern Primaries.jpg: . Modifications made by Jimfbleak.
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== {{int:filedesc}} == {{Information |Description=Another way roseates are stealthy: they blend in with the commons reeeeally well. They look very very similar. The biggest giveaway is that they have a bit more black on their beaks. Or, if you have a bird