These aviaries are actually refurbished old monkey cages. The grid of the cages used to be where you can see the side walls ending, so they gained a lot more depth. The bottom of the cages was roughly the height of the signs and was now extended onto what used to be partly visitor path and partly fencing for distance. Species list from left to right:
Scarlet Macaw & Black-headed Parrot
Blue-and-yellow Macaw & Blue-headed Macaw
Golden-headed Lion Tamarin & Greater Guinea Pig