It seems the most southern part of Canada is occupied by gulls. I had hoped to reach the southern extremity of Canada, but alas, this was not quite it. The spit I was on ended here only temporarily and then resurfaced about 300 metres farther out in the lake. Not only that, there is another smaller island, Middle Island that is even further south by about 3 km. So I haven’t been to any extremity of Canadian sovereignty yet, but this is the closest I’ve managed.