Which US states and Canadian province are specifically mentioned as containing parts of the Emperor Goose's wintering grounds?

Answer

Southern Alaska, British Columbia, Washington, and Oregon

Following their migratory flights, the population winters along the coastlines stretching across southern Alaska, British Columbia, Washington, and Oregon.

Which US states and Canadian province are specifically mentioned as containing parts of the Emperor Goose's wintering grounds?
raritybirdEmperor Goose