scoter and small Canada passage

the narrow passage between Campbell and Quadra concentrates migrating wildfowl in autumn and there were several flocks of scoters moving through, mainly Surf but with a few White-winged attached and off flocks of small race Canada's passed over while this juvenile White-fronted Goose dropped in on the spit walking about within 5m of a bemused walker before flying off prior to me getting good views of it -- need to try and work out what race it is