If you look very carefully at this photo, you can see that there are 11 vertical supports along the front of the range, but there are only 5 horizontal beams across the ground. I reckon this means that there will be 4 aviaries, but the ones at each end will be wider than the two in the middle. It is much easier to see this at the zoo than it is in a photo, even one as nice as this.
@gentle lemur I believe it has been said it was to be four, from my understanding, non the less they look very big, bigger than the last ones when I visited and saw them, they where in a sorry state and me and my family walked straight past to go to ROTRA. I hope they turn out for the best and perhaps give us some of the birds that are off show, I feel you veteran ZooChatters are dying to see!
@Bwassa I believe it is to be species of South East Asian birds, not sure which ones exactly but there are signs stating it is for birds from that sort of area!