A vet holds Bena, a 11-year old male Proboscis monkey, during a routine health inspection at the Singapore Zoo in Singapore July 5, 2011. Three Proboscis monkeys are undergoing checkups in preparation to be sent to Apenheul Primate Park in the Netherlands as part of an animal exchange to kick start a captive breeding programme. The zoo in Singapore is the first wildlife reserve to successfully breed Proboscis monkeys in a captive environment, according to an official. [Xinhua/Reuters Photo]