Golden-bellied mangabey (Cercocebus chrysogaster). A member of the Old World monkey family (Cercopithecidae) that inhabits tropical rainforests and swamp forests in central Democratic Republic of the Congo. Its abdomen is covered with golden-colored fur, a distinctive feature, but sightings in the wild are very rare and much of its ecology remains unknown. It mainly eats fruit and seeds, and also consumes leaves, tree resin, and flowers. It is primarily arboreal but sometimes descends to the ground when foraging for seeds. Groups are multi-male, multi-female, numbering 8–30 individuals, with the highest-ranking male performing defensive roles. It produces loud, far-reaching calls using a throat resonating sac. Breeding occurs from spring to summer, and the gestation period is about 160–180 days. The IUCN lists it as Data Deficient (DD), and a population decline is suspected.