@Philipine eagle I don't know for sure, but possibly since the Spring of 2021? I mentioned the Emin's turacos as they were signed, but unfortunately I haven't actually seen them during any of visits this year. The lemur area was closed during several of my visits so I couldn't see this aviary, and when I could go to it I never saw the turacos, although I did see all other species at some point.