Sandhill cranes and the threatened wood stork flourish in the area. Around the lagoon in the refuge are two wood stork refuges. The Eufaula NWR protects endangered and threatened species such as the wood stork. It is an important breeding area for the endangered wood stork and other wetland birds. Harris Neck NWR is also an important nesting area for the endangered wood stork. The park's wading birds include egrets, herons, wood stork and American white ibis. It is estimated that an adult wood stork needs about per day to sustain itself. Many bird species can be seen including wood stork, snowy plover and American oystercatcher. The wood stork is the only stork that breeds in North America. When flying to foraging areas, the wood stork averages a speed of about . The name tuiuiu is also used in southern Brazil for the wood stork ("Mycteria americana"). During the dry season, the wood stork eats mostly fish, supplemented by insects.