This is a rare, but potentially overlooked, spring migrant with records scattered across much of the period from mid-May to mid-June during that period where the peak of sightings are mostly clustered between May 25th and June 5th. In the Pribilofs, this is predominantly a southbound migrant with a few late June and early July records in early summer transitioning to a more consistent arrival of migrants from mid-July through to early August during late summer. This species does not begin to arrive in any numbers until about August 20th, with a very broad peak of occurrence across the entire month of September. Only small numbers typically remain in October with no records past the middle of the month, though this species is likely present through the end of October, and potentially into November in certain years.
