This gull is considered uncommon from spring through fall, with arrivals possible at almost any time from May to October. It is perhaps most likely between May 20th and June 1st during the spring though its pattern of occurrence is not well defined. Occasional individuals are seen through June into the summer with regular records from July into mid-September and again, there is little definition with regards to an overall pattern. It is perhaps most likely during the fall from August 25th to September 10th. There are only a few records into late September and very early October. This species is often associated with powerful storms in the Bering Sea like many other pelagic species.
