In summer it can seem that every patch of woods in the eastern United States rings with the rolling song of the Carolina Wren. This shy bird can be hard to see, but it delivers an amazing number of decibels for its size. Follow its teakettle-teakettle! and other piercing exclamations through backyard or forest, and you may be rewarded with glimpses of this bird's rich cinnamon plumage, white eyebrow stripe, and long, upward-cocked tail. This hardy bird has been wintering farther and farther north in recent decades.