The Northern Oriole name is also very outdated, the Baltimore Oriole has been the general name for Icterus galbula since the split from Bullock's in 1995. The Baltimore and Bullock's used to be considered a single species as the Northern Oriole so that may be the confusion there. While the species name for both species can technically be considered true, the "female" is definitely a male Bullock's as the black throat patch is a key indicator of a young male.
@Nile Hippo Expert Where are you getting that ID decision from? The bird's throat is barely visible and the black throat is not diagnostic anyway - some immature male Baltimores show one as well, to say nothing of male Hooded Orioles.
The angle of the oriole photo makes it impossible for me to come up with an identification that I could say is conclusive. I see the black line through the eye of the female oriole that suggests that it could be a first-year male Bullock's Oriole; however, that line could just be a shadow. With just this photo, I can't tell which oriole it is. Maybe the zoo doesn't know either and that's why they decided to take the easy way out and call them "Northern Orioles"! Didn't the Smithsonian Zoo breed some Baltimore Orioles last year? If so, maybe that's where one or both of these originated?
