These are the smallest subspecies, B. h. minima
These are undoubted CkGo. A flock of about 300 was at Pitt Meadows for a few days and many observers saw them on the ground. They were cackling, not honking. We rarely see CaGo in such large flocks here. Sorry for the poor photo (trouble with new lens)
Barnston Island, Fraser River, BC, Canada
Barnston Island, Fraser River, BC, Canada
Barnston Island, Fraser River, BC, Canada
Barnston Island, Fraser River, BC, Canada
Barnston Island, Fraser River, BC, Canada
Barnston Island, Fraser River, BC, Canada
Barnston Island, Fraser River, BC, Canada
Very long distance shots of Caspian Terns in North Vancouver, BC.
was able to see and ID up close, but couldn't get a great picture