Attributes / relations provided by
♦ ¹Note on Drill (Mandrillus leucophaeus) Ecology and Conservation Status in Korup National Park, Southwest Cameroon, CHRISTOS ASTARAS, MICHAEL MUHLENBERG, AND MATTHIAS WALTERT, American Journal of Primatology 69:1–7 (2007)
♦ ²Seed dispersal by Ceratogymna hornbills in the Dja Reserve, Cameroon, KENNETH D. WHITNEY, MARK K. FOGIEL, AARON M. LAMPERTI, KIMBERLY M. HOLBROOK, DONALD J. STAUFFER, BRITTA DENISE HARDESTY, V. THOMAS PARKER and THOMAS B. SMITH, Journal of Tropical Ecology (1998) 14:351–371