awareness bushbaby Chimpanzee J.A.C.K. Malbrouck monkeys International Primate Day JACK September 1, 2021 September 1, 2021 On Sept 1st, we celebrate both big and small primates. Nearly 2/3 of the primate species are classified as THREATENED by the IUCN Redlist. Today, J.A.C.K. takes care of 9different species of primates – most of them are ENDANGERED!