There's no difference between your map and mine which I collect exactly 1 month ago.
I presume that your map also has pictures of animals on the reverse side, including a red-crowned booby on the top left?
Dome nr. 3 with threatened species opened in 2014.
There have been no other major constructions since then and this map is species-wise not detailed enough to give an exact year. Therefore: 2014-2023, unless someone got a map with the same enclosures and buildings but with another lay out.
Thanks for your comments. It seems that we won't be able to officially put a date on this particular map as perhaps the zoo hasn't changed it substantially since 2014. The reverse side is a collage of 19 animal photos on my copy, with a Greater Blue-eyed Starling in the top left photo while your copy has a Red-crowned Booby. On mine, other images include those of a Komodo Dragon, Rhinoceros Iguana, two images of Penguins, Galapagos Tortoises, a Frilled Lizard and a Siamese Crocodile.
It is red-crowned turaco on mine, don't know how that booby came in
Mine has also 19 photos with amongst them also (1) pinguin, komododragons and a rhinceros iguana. But mine has spectacled caiman (no croc), crowned crane, bali myna, victoria crowned pigeon, ostrich and crested partridge. So they are different although the map is the same.
I am working on a trip report on this (and other) zoo and need to contact the zoo anyway, so I will ask if they can sort this out.