Another note just to say that the website now lists the zoo as having Philby's partridge, one of two zoos in Europe now with the species along with Zoo Koki in Spain.
The zoo now has an enviable Phasianidae collection (ten holders or fewer underlined, two holders or fewer bolded):
Blue-eared pheasant, Common pheasant, Greater Bornean crested fireback, Edward's pheasant, Elliot's pheasant, Golden pheasant, Grey peacock pheasant, Himalayan monal, Kalij pheasant, Koklass pheasant, Lady Amherst's pheasant, Satyr tragopan, Siamese fireback, Silver pheasant, Cheer pheasant, Barbary partridge, Cypriot chukar partridge, Crested partridge, Grey partridge, Philby's partridge, Black francolin, Bobwhite quail (cubanensis), California quail, Chinese painted quail, Erckel's francolin, Grey-breasted francolin, Green peafowl, Indian peafowl.
I reckon that's around third in Europe after Walsrode and Plzen...