Direct Stacked Investment Is a Flexible Reproductive Strategy for Female Colobus vellerosus J. V. VayroT. E. ZieglerP. Sicotte OriginalPaper 18 November 2020 Pages: 1 - 15
Plant Species Fed on by Wild Ring-Tailed Lemurs (Lemur catta) at Nine Sites Stephanie L. Canington OriginalPaper 06 January 2021 Pages: 16 - 25
Lethal Coalitionary Aggression Associated with a Community Fission in Chimpanzees (Pan troglodytes) at Ngogo, Kibale National Park, Uganda Aaron A. SandelDavid P. Watts OriginalPaper 07 January 2021 Pages: 26 - 48
Reproductive Parameters of Captive Female Northern White-Cheeked (Nomascus leucogenys) and Yellow-Cheeked (Nomascus gabriellae) Gibbons Penglai FanXin HePengfei Fan OriginalPaper 05 January 2021 Pages: 49 - 63
Feeding Ecology of the Omo River Guereza (Colobus guereza guereza) in Habitats with Varying Levels of Fragmentation and Disturbance in the Southern Ethiopian Highlands Dereje TesfayePeter J. FashingNils Chr. Stenseth OriginalPaper 30 January 2021 Pages: 64 - 88
Sleep Patterns of Aging Chimpanzees (Pan troglodytes) Kristin HavercampNaruki MorimuraSatoshi Hirata OriginalPaper 27 January 2021 Pages: 89 - 104
Human Activity and Forest Degradation Threaten Populations of the Nigeria–Cameroon Chimpanzee (Pan troglodytes ellioti) in Western Cameroon Chefor FotangUdo BröringKlaus Birkhofer OriginalPaper Open access 19 February 2021 Pages: 105 - 129
Activity Patterns, Diet and Home Range of Night Monkeys (Aotus griseimembra and Aotus lemurinus) in Tropical Lowland and Mountain Forests of Central Colombia Sebastián O. MontillaAlex Mauricio Mopán-ChilitoAndrés Link OriginalPaper 10 February 2021 Pages: 130 - 153