Large, mostly white stork with a distinctive yellow bill and bright red facial skin. It is more tied to wetland habitats than most other storks, and it forages with its bill partially submerged and open, stirring up prey in muddy pools with its feet. When it encounters prey it snaps its bill closed. It is a resident and partial migrant throughout its range, and although not particularly gregarious, it will congregate when food is abundant. The similar White Stork has a white (not black) tail, and it lacks the red facial skin and yellow bill of the Yellow-billed Stork.