As far as a traditional, city-zoo type setting goes; what are some crowd-pleasing African megafauna that could do well with such a smaller, savanna-type enclosure?
Being a 0.5-acre large exhibit; very large animals like giraffes and white rhinos, alongside ungulates considered to be “flighty” by nature will not work in this scenario.
Furthermore, could having an enclosure this large be feasible enough to support a tall, aviary-like setup?
Antwerp‘s Buffalo Aviary is 2250m² big, so you could definitely have an aviary-like enclosure.
My idea would be an aviary housing Nile Lechwes, Cape Buffalos, Eastern Crested Guineafowl, African Comb Duck, Cape Teal, African White-backed Whistling Duck, Speckled Pigeon, Dusky Turtle Dove, Hartlaub‘s Turaco, Black-winged Stilt, Crowned Lapwing, Spotted Thick-knee, Abdim‘s Stork, Hadada Ibis, African Spoonbill, Western Cattle Egret, Madagascar Pond Heron, Hooded Vulture, Rüppell‘s Vulture, Crowned Hornbill, Lilac-breasted Roller, Green Woodhoopoe, Red-and-yellow Barbet, Magpie Shrike, African Golden Oriole, Common Bulbul, Wattled Starling, Red-winged Starling, Superb Starling, Spotted Palm Thrush and Red-billed Buffalo Weaver