The bus doesn't go through the drive through area. The deer won't be seen close up I'm afraid, Other than the Pere David's possibly or the Hog deer which are labelled in a corner paddock near the tigers.
If you look on ZTL, the majority of the birds are either off show or part of the bird show.
On show areas are :
Penguins - Rockhopper & African
Caribbean flamingo
Lake by main Cafe - Pelican, White Stork & various geese
Aviary adjoining cafe - Chough, little egret, white faced whistling duck and possibly a species of Ibis still.
Owl wood - Snowy, Ural, Great Grey & Northern Hawk owl
Stanley Crane and Darwin's Rhea either side of road between elephants & butterfly house.
Manchurian Crane just along from Sloth Bears
Think that's about it, though there may still be Emu in the paddock to the right at the end of the drive by the Hippo pools ( behind kudu & impala paddock.