I know very little about birds but like to take pictures of what I see here in British Columbia.
Last weekend I was on Cortes Island in B.C. and there were lots of oystercatchers, Canada Geese and other birds. But I saw these birds that gathered in groups in the water, they would briefly dive one-by-one under the water, but it was neat to see them swim in a V-formation in the morning. The photo does not show coloration very well, but I wonder if anyone can tell me what these are?