African forest elephant
The results of a survey conducted in clearings within the northern part of the park, published in 1998, showed the presence of thirteen large mammals, the most frequent of which were the bongo, buffalo, African elephant, forest hog, giant forest hog, gorilla, and sitatunga. Other mammal species recorded include the African civet, African forest elephant, black-and-white colobus, and common chimpanzee. Poaching has been attributed to the park's elephant population decline. Surveys of Odzala-Kokoua's African forest elephant population resulted in estimates of approximately 18,200 and 13,500 in 2000 and 2005, respectively. There were approximately 9,600 elephants, as of 2014.