red-cockaded woodpecker (Picoides borealis), which prefers to excavate nesting and roosting cavities in living trees of longleaf pine that are 80–120 years old. Another rare species that can be found is the Pine Barrens tree frog, which are tolerant of low pH levels and often lay eggs in shallow, acidic ponds. The species can only be found in the Carolina Sandhills, Southern Alabama/Florida panhandle and the closely related ecosystem New Jersey Pine Barrens. Dryophytes andersonii is also the state amphibian of North Carolina. Human history Sand Hills cottage architecture is a style that developed in this area in the early to mid-1800s; it is a modified form of Greek Revival architecture. The people of the 'Piney Woods' that once covered the Sandhills and Inner Banks were known as "Goobers" around the time of the Civil War. Preservation The Carolina Sandhills National Wildlife Refuge in northeastern South Carolina attempts to preserve a fraction of the original Sandhills longleaf pine ecosystem. The refuge is located in Chesterfield County near McBee. References External links Aspects of NC Climate--Carolina Sandhills—accessed 19 March 2007 Carolina Sandhills National Wildlife Refuge—accessed 19 March 2007 Carolina Sandhills National Wildlife Refuge (Brochure)—accessed 19 March 2007 Carolina Sandhills National Wildlife Refuge--fire management—accessed 19 March 2007 Carolina Sandhills National Wildlife Refuge--flora and fauna—accessed 19 March 2007 South Carolina Naturally—accessed 19 March 2007 Sandhills--Nature Conservancy—accessed 19 March 2007 Sandhills Fact Sheet—Savannah River Ecology Laboratory—accessed 19 March 2007 South Carolina Department of Environmental Resources—Sandhills Ecoregion Terrestrial Habitat—accessed 19 March 2007. Regions of North Carolina Regions of South Carolina