Four animals have escaped from their Perth Zoo enclosures since the highly publicised breakout of a mother and child orang-utan nearly two years ago.

The other escapees have included a binturong, a red panda and a ghost bat.

In May 2017, Sunday visitors to the zoo were stunned when they found the two orang-utans on a boardwalk alongside their enclosure, pictured.

The young orang-utan had either fallen or dropped from a rope into an external garden.

Its mother dropped down from a nesting platform to retrieve her child. The boardwalk was evacuated and, after 22 minutes of freedom, the pair climbed back to their enclosure using an external wall.

Details obtained via Freedom of Information show there have been four escapes since then.

Twice within four days in December 2017, a baby binturong escaped.

On one occasion it was found above a small viewing bay and the other it was in a nearby tree.

On each occasion, the binturong escaped through a hole in its enclosure — one in wire mesh and the other in roof capping.

Repairs were done and a full inspection was undertaken to ensure there were no other “potential issues”.

In June last year, a red panda was found in a peppermint tree after escaping from its enclosure.

It was “free” for about 90 minutes and returned to its enclosure after trees in the vicinity were trimmed.

In September last year, a ghost bat escaped through the airlock of the zoo’s nocturnal house. It was returned 50 minutes later.