A few years ago, in early March, I went on a wonderful birding tour of the Donnelley and Bear Island Wildlife Management Areas in Colleton County, South Carolina - it was in early March, on a day when the sky seemed to change every few minutes. It's just a short detour off of US 17 - and a worthy one, although you do need to plan a head a bit. We were able to see a number of birds during our tour - a list of common sightings can be found at the Carolina Bird Club. Here's a bit about the place from the South Carolina Department of Natural Resources website:
Donnelley WMA is named in honor of the late Gaylord Donnelley and his wife Dorothy for the contributions they made to the ACE Basin Project and conservation across the continent. Donnelley WMA is owned and managed by the South Carolina Department of Natural Resources. Ducks Unlimited, The National Wild Turkey Federation, US Army Corps of Engineers, The Nature Conservancy and other conservation interests participated in establishing the property.
The unique property is a cross section of the Lowcountry and encompasses a diversity of wetland and upland habitats including: managed rice fields, forested wetland, tidal marsh, agricultural lands and a variety of upland types, including a natural stand of longleaf pine.
The area is managed under a multiple use concept to achieve the following objectives: protect and enhance the diverse wetland and upland habitats for resident and migratory species of wildlife; provide quality hunting and other wildlife related recreation opportunities for the public; maintain and restore representative natural plant communities; and provide an area for natural resource related research and education programs.
DNR intensively manages the area to provide optimum habitat for a wide variety of wildlife and to provide public recreation and education. The area has two designated nature trails and miles of dirt roads for hikers and bicyclists. Late winter through early spring provides bird-watching opportunities to observe a variety of species including waterfowl and migratory songbirds. Alligators are abundant in the managed wetlands and are most often seen from late February through mid-November. Hunting opportunities are available to the public for white-tailed deer, wild turkey, waterfowl, dove, small game and furbearers.
You can read about the Gaylord and Dorothy Donnelley Foundation at their website.