The water level in the ponds can be manipulated. The image shows the pond as it was last month for the Storks & Corks event. The lower water level provides better feeding opportunities for Wood Storks (Mycteria americana). However, plenty of other wading birds (heron, egret, and ibis) take advantage of buffet provided by the wetland habitats of the ponds and nearby Savannah River.
Photo credit: Glossy Ibis by Don Wuori, Silver Bluff pond by Jeff Mollenhauer