Avifauna - "Megaproject Savanna"
The actual trigger for me to make an Avifauna project! Avifauna themselves created a masterplan that is clearly not going to happen (remind you of anyone?). A giant aviary going over the entire rosarium, with a separate island for a Lemur and Meerkat walkthrough, a large savanna with Giraffes, ostriches and zebras. As well as free-flying secretary birds, ground hornbills, vultures, pelicans, flamingos, Cranes, Storks, Ibises and many others (a species mix that would definitely not work). So I decided to make a toned down version (while still sticking to the original idea)
Original concept art:

This would go over the new cerrado enclosure, monkey island and night safari
Toned down version:
Megaproject savanna is made as a large upgrade to the Vulture aviaries (they really need that upgrade), as well as providing new space for the Ostriches. Keeping in theme for both the North African Ostrich and the Rüppels griffon vultures, all the animals and free-roaming birds are from the plains of Sub-Saharan North Africa.
The whole aviary is covered in plants, with some pockets of larger bushes and trees, as well as flat plains with scattered areas of heath plants and hairgrass, as well as some winter-hardy palms and cactus-like plants. The little Savanna area is more sandy and empty in front, but has more foliage in the back.
Four large fake dead trees provide perching spots for the vultures, and a large wetland area (with lots of reeds!) provide foraging opportunities for multiple wading birds. The Big Savanna enclosure is at the same ground level at the sides, but lowers down near the central path area not only to prevent viewing issues with a fence, but also to allow them to walk under the path to the second half of the big savanna.
You begin at a nice viewing area over the Savanna's watering hole, walk over a short boardwalk over the wetland area, then the "heightened" path between the two areas of the Big Savanna. There's a short bushland area for watching the birds, as well as a birdwatching tower with viewing over the whole aviary. Near that is also a Hyrax and Porcupine enclosure. From there, you walk past the Little Savanna enclosure, which is bordered by a fairly simple wooden fence, and on to the stables. From here is another viewing point (this time at ground level, separated by mesh) as well as an enclosure for African Spurred tortoises, which also have a same-sized indoor enclosure for the winter. There's another small swamp area, which is more forested, and finally a bridge to the exit/entrance to parakeet paradise. (A lot of these design elements can already be seen on the original concept art).
In the back of the Separation enclosure, an extra viewing platform is added, for people who might be scared of vultures, or even to be used during bird flu. This one is heightened above ground level and accessible via a typical winding wheelchair-ramp (if that makes sense) which goes through a very small bushland area
The big savanna holds 1.1 North African ostrich, 1.3 Nile lechwe or 1.4 Impala and 2.2 Barbary sheep (isn't this cool, I've never done these numbers before!). Only one antelope species is allowed on the Big Savanna at a time, so it's either the Nile lechwe with the Ostriches and Barbary sheep, and the Impala in the separation or vice versa. The little savanna holds 1.1 Somali wild ass and 1.2 Northern warthog. (All species are kept in smaller numbers as the enclosures are not that big). The hyrax enclosure holds 4.4 Rock Hyrax and 1.1 Crested Porcupine.In some areas (hidden by foliage) exist "dikdik doors" to allow for Kirk's dikdik, as well as some ground birds, to have access to the Big Savanna and the visitor area.
That would look something like this in comparison with the pre-existing park (Also parakeet paradise):
Inside the Savanna aviary are a LOT of free-roamers:
Free-roaming species list:
African openbill
Saddlebill stork
Abdim’s stork
Yellow-billed stork
Hamerkop
African spoonbill
Western black-crowned crane
Western cattle egret
Egyptian plover
Glossy ibis
Purple heron
Rueppel’s griffon vulture
White-headed vulture
Hooded vulture
African comb duck
Ferruginous Duck
White-faced whistling duck
Vulturine guineafowl
Laughing dove
Speckled pigeon
Namaqua dove
White-cheeked turaco
Von Der Decken’s hornbill
Wattled starling
Northern carmine bee-eater
Green woodhoopoe
Nyasa lovebird
Kirk’s dikdik