At the very top of a towering pine perched a small bird singing for all he was worth. It sounded like a wren, but as I looked closer, I saw a blush of pink. My best guess was a purple finch. But when I enlarged the photos on my computer just now, I realized this is a new bird I've never seen before! I wonder if there are any birdwatchers among my readers. Can anyone identify our mystery harbinger of spring?