North Carolina is not the only state with a trail dedicated to spreading the word about birdwatching opportunities. Florida and Texas were pioneers, and many of our neighboring states have trails, including Virginia, Georgia, and now Tennessee.
The Tennessee Birding Trail includes all sorts of resources for bird-watching enthusiasts of all interest levels. Sites can be searched by region, species, seasons, or keywords. They also feature a beautiful gallery of birds submitted by photography buffs. For the species-counter, there's a list of recently-seen rare birds from eBird.