This strikingly white Glaucous Gull was seen on May 30th at a Portsmouth site not open to the public. The species is rare here at any season. Variable in size, this one is about the size of the adjacent Herring Gull and distinctly larger than the nearby Lesser Black-backed. Its white wingtips project only a little past the tail. Its large bill is sharply two-toned. Glaucous hybridizes with other gulls, but this one doesn't show any obvious signs of being a hybrid.
Brian Taber
