Pied imperial pigeon, Grey-capped emerald dove, Luzon bleeding heart pigeon, Nicobar pigeon, Sclater's crowned pigeon and Golden pheasant. Between the entrance and exit of the Orangutan Greenhouse. There is also a viewable indoor aviary.
@KevinB Well the pigeons and doves are one of my favorite bird groups and they seem to mix well together and with other birds, so I enjoy seeing the diversity in these types of aviaries.
@Summer Tanager Personally I grew even fonder of the pigeons and doves last year after seeing a lot of different species of them at Weltvogelpark Walsrode.