Howell, Christian Paul, and Simon Childs. “Use of a ‘Creep’: Zoo Animal Management to Encourage Reproductive Behaviours in Captive Bornean Orangutans (Pongo Pygmaeus)”. Journal of Zoo and Aquarium Research 8, no. 3 (July 31, 2020): 203–207. Accessed November 23, 2024. https://jzar.org/jzar/article/view/368.