On Monday, some lucky homeowners in Wellfleet got to see a chickadee. They saw it well, photographed it, and got the word out to some other birders. Soon, a handful of the Cape’s most active birders had seen the chickadee. Phones were ringing. “Have you heard about the chickadee?”, the person on the other end would say. “There’s a chickadee in Wellfleet.” I am, of course, trolling you a little bit here. For this was not your usual chickadee. This was the rare and mysterious Boreal Chickadee, a species not seen on Cape since 1994, and one never seen on either of the islands.