This species was once considered an annual vagrant during the late spring in the Pribilofs, however its occurrence has steadily declined in recent years and sightings have become much less regular, though it is still more regular than many other species of Asian vagrants. Many of the records for this species include individuals that were present for an extended period of time or small influxes of birds that were present over an extended period though different individuals may have been involved from start to finish. Since 1980, nearly all records of birds have arrived between June 5th and June 20th. There are only a few summer arrivals, all from the first half of July.
