@bruni No, they leave here in late Autumn when the water freezes up and come back in spring. They feed on the grasses in the water. So they can stay if there is flowing water but in Maine that usually freezes too.
They can be such a nuisance when they over populate like this. What they leave behind is pretty disgusting- and disease ridden! But they can also be quite photogenic and as is usually the case, the babies are cute. I see the farmer has roped off an area so they won't get in there- good idea! Good catch.
