A female wombat called Wanda is recovering at Adelaide Zoo's Animal Health Centre after undergoing hip replacement surgery.
It is the first time the operation has been performed on animal of her size.
At 22, Wanda is in her twilight years and had developed debilitating arthritis in her hip.
She had stopped using one leg and needed a step to get into her nest.
Vets decided surgery was the only option to save her life.
Wanda is expected to make a full recovery.