Into the night: camera traps reveal nocturnal activity in a presumptive diurnal primate, Rhinopithecus brelichi Chia L. TanYeqin YangKefeng Niu News and Perspectives Open access 29 July 2012 Pages: 1 - 6
Social relationships of nulliparous young adult females beyond the ordinary age of the first birth in a free-ranging troop of Japanese macaques (Macaca fuscata) Noriko KatsuKazunori YamadaMasayuki Nakamichi News and Perspectives 28 August 2012 Pages: 7 - 11
Integration of a hand-reared chimpanzee (Pan troglodytes) infant into a social group of conspecifics Maria ThunströmTomas PerssonMats Björklund News and Perspectives 14 August 2012 Pages: 13 - 19
Anxiety-related behavior of orphan chimpanzees (Pan troglodytes schweinfurthii) at Gombe National Park, Tanzania Maria BoteroSuzanne E. MacDonaldRowland S. Miller News and Perspectives 14 September 2012 Pages: 21 - 26
Identification of individual adult female Javan lutungs (Trachypithecus auratus sondaicus) by using patterns of dark pigmentation in the pubic area Yamato TsujiKanthi Arum WidayatiKunio Watanabe News and Perspectives 18 November 2012 Pages: 27 - 31
Molecular evidence for the introgression between Hylobates lar and H. pileatus in the wild Kazunari MatsudairaUlrich H. ReichardTakafumi Ishida News and Perspectives 15 August 2012 Pages: 33 - 37
Singing by male and female Kloss gibbons (Hylobates klossii) in the Peleonan Forest, Siberut Island, Indonesia Helen M. DooleyDebra S. JudgeLincoln H. Schmitt Original Article 02 September 2012 Pages: 39 - 48
The effect of urban and rural habitats and resource type on activity budgets of commensal rhesus macaques (Macaca mulatta) in Bangladesh M. Firoj JamanMichael A. Huffman Original Article 18 September 2012 Pages: 49 - 59
Reproductive parameters of female orangutans (Pongo pygmaeus wurmbii) 1971–2011, a 40-year study at Tanjung Puting National Park, Central Kalimantan, Indonesia Biruté Mary GaldikasAlison Ashbury Original Article 04 October 2012 Pages: 61 - 72
Do chimpanzees (Pan troglodytes schweinfurthii) exhibit sleep related behaviors that minimize exposure to parasitic arthropods? A preliminary report on the possible anti-vector function of chimpanzee sleeping platforms David R. SamsonMichael P. MuehlenbeinKevin D. Hunt Original Article 26 September 2012 Pages: 73 - 80
Female parity, male aggression, and the Challenge Hypothesis in wild chimpanzees Marissa E. SobolewskiJanine L. BrownJohn C. Mitani Original Article 25 October 2012 Pages: 81 - 88
Epidemiological study of zoonoses derived from humans in captive chimpanzees Takanori KooriyamaMichiko OkamotoTakako Miyabe-Nishiwaki Original Article 14 August 2012 Pages: 89 - 98