A Problem with Gulls
10,000 Birds
MARCH 4, 2011
Collectively, they’re referred to as the Herring Gull complex. References in original]: [T]he taxa regarded by Mayr as subspecies of these two are now regarded as distinct enough to be regarded as separate species. argentatus as reference. This wiki looks good too.] michahellis. michahellis Caspian gull L.
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