Wildlife cameras were set up after Samba was first spotted in August, hoping she’d come back to the same spots.
The zoo says that the team have been working “tirelessly to bring her safely back”.
Experts there say the process of bringing her back is a “carefully managed process” and although they know the area she is in, it’s not as simple as “being able to approach and collect her”.
In a statement the zoo said: “It’s vital that we keep any stress to an absolute minimum, as frightening or disturbing her could cause her to move away from the area and make her safe recovery more difficult.”
Staff at the zoo have established a feeding area, encouraging Samba to become familiar with the location and return regularly.
“This is an important step in our plans to safely recover her,” the zoo explained.