The Wildlife Sanctuary is located across the small river in your Town Area and is unlocked at Reputation Level 3. To access it, you will need to unlock the Expansion Areas that are connected to the Sanctuary.
How to get Sanctuary Animals?
By the river, there is a desk with a blue Sanctuary Book on it. Repair the desk and open the Book to get your first Sanctuary Animal for free! To unlock more animals, you need to collect Puzzle Pieces. Each animal requires 36 Puzzle Pieces. You can check your progress in the Sanctuary Book.
There are a total of 28 animals, 2 adults and 2 babies of each of the following animals:
Giraffe
Hippo
Elephant
Zebra
Gorilla
Reindeer
Arctic Fox (only adults)
Cheetah (only adults)
Once you collect all Puzzle Pieces for a second animal of the same species, you simply need to upgrade the Animal Shelter for free to have the animal in your Sanctuary. It’s the same way to get baby animals as adult ones, just that you first need to have both of the adult animals of one kind to unlock the baby animal of the same kind.