confusing ibi

These birds seem to show the pale-line pattern of Glossy Ibis. Of course, their red eyes give them away as White-faced Ibis.
Can we identify them earlier in the season when their eyes are dark?
Photos by Bill Bousman.

Figure 1: Grayscale photo in North American Birds, 64(2), 2010.
Photo taken 6 March 2010.

Figure 2: Color version of above photo.

Figure 3: Photo taken 21 Dec 2009.