>>> Farmers with field crops are often beset with Canadian Geese overwintering in the Willamette Valley.
No. I strongly suspect they are dealing with Canada Geese. They are dominant in the photos. Canadian geese would be some random species of geese carrying a Canadian passport. Canada geese are the distinct grey-black species aka cobra chickens.
https://midwesternnewspapers.com/dont-cross-the-dreaded-cana...