A Great White Egret fixes up his?/her? nest (both participate in the building) at the Audubon Park rookery in New Orleans. The rookery is a island in the bayou which makes a loop through the park. On the inner shore is a golf course. On the outer shore is a jogging path that runs around the park and an excellent observation bank for people and photographers to sit or stand (I am not implying, note you, that photographers and people do not overlap).
Herons with white feathers are generally called egrets. Note the long s-shaped neck and the strong yellow bill (orangish in breeding season) made for stabbing prey. The long filamentous plumes on the falling down the side of the bird are breeding plumage called aigrettes. Also the green along the sides of the eye (lores) are a breeding sign for both males and females. The nests go to nearly the tops of the trees.
-- steve buser