A Rare Bird In These Parts, I Believe

We sighted this bird last weekend in the area of Swains Lock.  It was the first time I am seeing it on the C&O canal.OLYMPUS DIGITAL CAMERASome research suggests that this could be a juvenile White Ibis, one of my remaining reasons for doubt being the color of the tarsi on the bird.  If I am correct however, the Smithsonian Field Guide to the Birds of North America suggests that this a somewhat rare appearance in these parts.  I wonder if juvenile birds of this kind can get lost.

I would appreciate it if there are any birders out there who can confirm or correct my attempt to identify the bird.  From what I read, the ibis belongs to the same family of birds as the stork, and I have seen pictures of storks with similar beaks.