Six joeys are thriving at the popular Ballarat tourist attraction, with five now having emerged from their mothers' pouches so far: Monty, Yoda, Arthur, Alfie and CJ.

One is yet to show its face, and with an all-male brood up to this point, staff are holding out for a girl.

Newborn koalas tend to remain hidden in pouches for several months, feeding exclusively from their mothers' milk as they grow. They also develop eyes, ears and fur in that time before eventually venturing out.

According to wildlife park co-owner Julia Leonard, it has been an unusually good year for joeys, with more successful births than average.

"We've got a bit of a breeding boom," she said. "We generally average around three of four [joeys]."

She attributes the spike in births to "good eucalyptus" and "the right pair-ups".

She said a couple of the new arrivals were particularly important to the team as their parents had been rescued from the wild. "It's pretty exciting they have had offspring," she told The Courier.

"It's good to know if you rescue something, it can breed as well."

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