Sanctuary director Greg Irons told Daily Mail Australia that Fred's age isn't know for certain, but that chances are he actually became a centenarian a few years back.
"We aren't 100 percent sure but we think that he is well past," he said. "He was 95-years-old when I started working, which was 10 years ago - we just waited a bit longer to make sure he is past 100."
But all the attention devoted to Fred on his birthday was for more than just a celebration. The sanctuary, whose focus is on rescuing, rehabilitating, and releasing wildlife, also used the occasion to remind guests that they should give a second thought to keeping sulphur-crested cockatoos as pets, as they require a lifelong commitment.
Fortunately for Fred, even after outliving his owner, he's still surrounded by many folks who care.