Warm day today, nearly 80 in the Boston area. On our evening dog walk it had cooled down a bit, and the Riverway was thick with birds. We saw a half dozen catbirds, three groups of Canada geese with goslings, and a few unidentifiable warblers. And then on the way back I heard my favorite bird song. It was right by the path, so we stopped for a while until we could see him. He sang for a few times more, and at the moment when Alexis pulled her camera out, he flew off.