This undated handout photo from Wildlife Reserves Singapore released on July 16, 2020 one of the twin red-ruffed lemur (L) with its mother named Minnie (R) at an enclosure at Singapore Zoo. - Twin red-ruffed lemurs have been born at Singapore Zoo, officials said July 16, in a rare event that is a boost for the endangered primates. (Photo by Handout / WILDLIFE RESERVES SINGAPORE / AFP) / -----EDITORS NOTE --- RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / WILDLIFE RESERVES SINGAPORE " - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO ARCHIVE