The American White Ibis (Eudocimus albus) is found from Virginia via the Gulf Coast of the United States south through most of the coastal New World tropics.
Adults have an overall white plumage, bright red-orange down-curved bill and red-pink long legs, and black wing tips that are usually only visible in flight.
Males are larger and have longer bills than females.
Juveniles (fall through winter) are brown above and white below with a streaky brown neck.
The legs and bill of juveniles are orange-pink.
Immatures (first summer birds) are splotchy brown and white above as they molt into adult plumage.

First 4 photos: Brazos Bend State Park, Texas, USA, 27 October 2006
Last photo: In the company of a male Blue-winged teal. Brazos Bend State Park, Texas, USA, 2 March 2009