nWestern population breeds from n Alaskan coast
eastwards to Banks (NWT) and Victoria (NU) Islands of arctic Canada.
nMidcontinent population breeds from e Victoria Island
south to Pelly Lake (NU), e to sw Baffin Is, s to Southampton Is. and
along w coast of Hudson Bay (NU/MAN) to mid-James Bay (NU) and
on east coast of Hudson Bay (PQ).