Similarly , the northern populations annually migrate between regions west of the Rocky Mountains , including Western Canada , and overwintering areas on the California coast . Similarly , the northern populations migrate annually between regions west of the Rocky Mountains , including western Canada and overwintering sites on the coast of California .
Begitu juga, penduduk utara setiap tahun berhijrah antara wilayah barat Pergunungan Rocky, termasuk Kanada Barat, dan kawasan yang terlalu banyak di pantai California. Begitu juga, penduduk utara berhijrah setiap tahun antara wilayah barat Pergunungan Rocky, termasuk Kanada barat dan tapak overwintering di pantai California.