Only the immature female lacks black on the face or throat consistently. In adult females, even if the head is entirely greenish, it is a dusky grayish green, often forming a shadow hood in the pattern of the male's. The Hooded and Bullock's Orioles are far more familiar to most of us, but it may be worth reviewing the females' identifying features. The female Hooded Oriole is a more uniform paler, yellower greenish, lacking noticeable streaking on the back. Again, the belly and undertail coverts are entirely yellowish.
Females lack a black bib, whereas immature males have one in the same pattern as the adult males.
The Hooded's bill is the most notably curved of all our regular species of oriole. Female Bullock's Orioles are distinguished by always having whitish bellies, becoming grayish on the flanks. Their undertail coverts may be slightly tinged yellow, but there is always wide separation between the yellow of the breast and that of the undertail coverts. The females vary greatly in possessing or lacking a small black bib, smaller than the Hooded's. Their white wingbars are broader than in the other species, echoing the large white wing patch of the adult males.