Oh, ok, I was thinking that it was a neotropical themed aviary with ringed teals, toco toucan and purple gallinule.
Anyway, Euplectes progne seems to be as rare in zoos as the quetzal... And no idea of why, as they should be as easy to keep as other Euplectes that are very common in aviculture...
Well, only time will be who tell us which species will appear in children zoo.
It probably is a South American exhibit. My point is that it's just an artist's impression that cannot be interpreted as "X species will be in this exhibit".