It has now closed, it closed on January 3rd 2023.
Over the final five days from last Friday, Jurong Bird Park had more than 30,000 visitors, the Mandai Wildlife Group that manages the park said.Staff members of Jurong Bird Park posing for photos after the park shut for the final time on Jan 3, 2023 before its move to a new location.
Source: https://www.todayonline.com/singapore/jurong-bird-park-shuts-after-52-years-2600-people-final-visit-2084236