During which time period are large flocks of Emperor Geese most often seen moving south through coastal British Columbia and down to Washington and Oregon?

Answer

Early to mid-fall

Birders along the Pacific Flyway have the best chances of seeing large moving flocks during early to mid-fall as they travel south toward their wintering grounds.

During which time period are large flocks of Emperor Geese most often seen moving south through coastal British Columbia and down to Washington and Oregon?
raritybirdEmperor Goose