Fir Island, just outside of Mount Vernon, is known for its great views and excellent bird watching. When the skies are clear — as they were on Thursday morning, Jan. 23 — Mount Baker, Mount Rainier and the Olympic Mountains are all visible. Throughout the winter, thousands of snow geese will cloud the skies, joining the legions of other bird species who live, sleep and eat in the bountiful farmlands and waters of the Skagit Valley…