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