The Congo rainforest is home to one of Africa's least-known and most threatened monkeys: the golden-bellied mangabey. Golden-bellied mangabeys form extraordinarily large troops of dozens of individuals, and field observations reveal a complex social structure reminiscent of that of humans. The species faces significant threats from habitat loss, hunting and illegal trade, with experts pushing for stronger legal protections, including an upgrade from CITES Appendix II to Appendix I listing. Conservation efforts are slowly gaining momentum, with priorities including law reform in the Democratic Republic of Congo, upgrading the CITES listing, and conducting comprehensive surveys to better understand the species' distribution and ecology.