Breeding adult differs from breeding adult white-faced ibis by olive-brown (vs. reddish) bill, brown (vs. red) eyes, gray-green legs with red joints (vs. all-red legs), and lack of a white feathered area adjacent to facial skin; also, in glossy ibis, pale edge of gray facial skin does not extend behind eye or under chin (white-faced ibis adult has white behind eye and under chin). Winter adult differs from winter adult white-faced ibis in usually having a pale line between the eye and bill (line absent in white-faced). In first fall plaumage, indistinguishable from immature white-faced ibis (NGS 1983).
Rights Holder: NatureServe
