In early 2008, an orangutan escaped her enclosure. She had escaped for an hour and was on top of the Sumatran tiger nighthouse before a group of school children alerted staff. That same year, an orangutan named Jorong was seen rescuing an injured moorhen chick from a pond, "patiently coaxing the bird ashore with a leaf before gently lifting it onto grass"; the rescue became known to the wider public in June 2011, when a four-minute video of the event was posted to YouTube.