The very much adored Tito the Spider monkey celebrated his first birthday. And of course, he was spoiled rotten with his very own cake.

Primate keeper Daisy Murphy said Tito's keepers were very "proud" of how far he had come.

"It was his first birthday on Thursday. He had a little cake to himself because his family members aren't very good at sharing," Ms Murphy laughed.

"Then he got a big cake to share with his family on the [monkey] island."

Tito has kept keepers busy after he rejected by his mum just a day after his birth.

So Ms Murphy and two other keepers have been hand raising him for the last 12 months.

"We are slowly transitioning him into the group," she said.

"It's a slow and steady process. We are hoping one of the adult females will adopt him. We are working our best. It's a big job but we are very proud."