My boyfriend and I went to chase a reported Barnacle goose, only to discover it was a Barnacle x Cackling hybrid! We noted the bird had a brown breast instead of black, too much black in the lores, too much brown-grey plumage on the sides, and brownish-grey plumage overall instead of grey.
Bummer it wasn't a Barnacle, but still neat to see a hybrid of two uncommon/rare wild geese.