1. Grouping behavior of Sumatran orangutans (Pongo abelii) and Tapanuli orangutans (Pongo tapanuliensis) living in forest with low fruit abundance. Issue 5 (18th March 2020) Authors: Roth, Tom S.; Rianti, Puji; Fredriksson, Gabriella M.; Wich, Serge A.; Nowak, Matthew G. Journal: American journal of primatology Issue: Volume 82:Issue 5(2020) Page Start: n/a Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗