The Dare Co. Bombing Range is a great place to look for birds and butterflies, too. One of my favorite spots is up Stomper Road, where there's a huge manmade marsh on one side of the road and pocosin forest on the other side. Butterflies are best here in early to mid-September when the Mistflower is in bloom. Here's a link to the location in Google Maps:
Stomper RoadAnother great road to explore while in the area is just a couple of miles east on US 264. This dead end road goes through pocosin forest and dead ends at the sound in a couple of miles, passing by some nice marshes. Link to the entrance of this road (don't remember the name):
35 36 56.6 N, 75 49 52.7 W