The Mountain bongo/yellow-backed duiker exhibit is still partially visible through trees from a corner area near the orangutans. They closed off that shaded map area so that no one would be anywhere near the construction site and presumably to allow more space for any construction vehicles. I think the cape vulture exhibit will only take up the area by the old ibex exhibit.
Yeah, that would make sense. All that space does seem large for only Cape vultures (Gyps coprotheres)....