White Ibis

What a great blue eye! What a striking bird!  

It's really not until the White Ibis flies or stretches that you really notice those black wing-tips!

The immature is basically two-colored, eventually losing the brown totally.
White-faced Ibis

The White-faced Ibis has a curved gray bill, red eyes, red or gray-green legs, iridescent purple-red feathers, and (during the breeding season) his red bare facial skin is ringed with a white band of feathers (thus his name!) 

The "first winter" (September-March) White-faced Ibis has the red eye, but it's harder to see, gray-green legs, and lacks the red facial skin.

Roseate Spoonbill
  Coming in for a landing at High Island, Texas
  Roseate Spoonbill, juvenile