None of the escapees left the zoo premises and all are unharmed.

Sniffer dogs and thermal cameras were used to try to detect the animals.

Patrick said the last sister was seen “in a little crevice” at 7:30 p.m. Tuesday night.

The search team had set up a trap in the area, with meat inside, but the young raccoon bothered them for seven hours.

“He kept getting closer and suddenly he decided he wasn’t going to go in,” she said.

There are five raccoon sisters on the site, each named after parts of the US where the animals live in the wild.

Winnipeg, Dakota, Myrtle and Alma left Marion behind Thursday night after they “blasted a hole in the roof” of their enclosure, Ms. Patrick said.

They are now being held in a temporary facility while repairs are being made to the roof of their facility.

“They are very happy to be back together and have been sleeping on top of each other throughout the night,” Patrick said.

He added: “Thank you to everyone who offered help and your kind words and messages kept us going.”