Bornean orangutans: primary forest in Danum Valley and rehabilitation program on Orangutan Island Tetsuro Matsuzawa Editorial 03 November 2019 Pages: 477 - 483
The Primates 2019 Most-Cited Paper Award Tetsuro Matsuzawa Editorial 05 November 2019 Pages: 485 - 486
Social hair plucking is a grooming convention in a group of captive bonobos (Pan paniscus) Colin M. BrandLinda F. Marchant News and Perspectives 30 September 2019 Pages: 487 - 491
Water games by mountain gorillas: implications for behavioral development and flexibility—a case report Raquel CostaMisato HayashiMasaki Tomonaga News and Perspectives 29 August 2019 Pages: 493 - 498
Signaling across the senses: a captive case study in pair-bonded red-bellied lemurs (Eulemur rubriventer) at the Duke Lemur Center, NC, USA Britt SingletaryStacey Tecot News and Perspectives 24 October 2019 Pages: 499 - 505
Social relationships and greetings in wild chimpanzees (Pan troglodytes): use of signal combinations Eva Maria LuefSimone Pika Original Article 24 September 2019 Pages: 507 - 515
Chimpanzees use observed temporal directionality to learn novel causal relations Claudio TennieChristoph J. VölterMichael Tomasello Original Article Open access 23 September 2019 Pages: 517 - 524
Longevity and mortality of captive chimpanzees in Japan from 1921 to 2018 Kristin HavercampKoshiro WatanukiSatoshi Hirata Original Article 03 October 2019 Pages: 525 - 535
Prevalence of gastrointestinal parasites in lion-tailed macaque Macaca silenus in central Western Ghats, India Shanthala KumarHonnavalli Nagaraj KumaraPalanisamy Sundararaj Original Article 29 August 2019 Pages: 537 - 546
Salivary alpha-amylase enzyme is a non-invasive biomarker of acute stress in Japanese macaques (Macaca fuscata) Nelson Broche Jr.Rafaela S. C. TakeshitaMichael A. Huffman Original Article 20 September 2019 Pages: 547 - 558
Anointing with commercial insect repellent by free-ranging Cebus capucinus in Manuel Antonio National Park, Quepos, Costa Rica Edilton R. SantosStephen F. FerrariGustavo A. Gutiérrez-Espeleta Original Article 22 August 2019 Pages: 559 - 563
Genetic differentiation and diversity of the Bolivian endemic titi monkeys, Plecturocebus modestus and Plecturocebus olallae Julia Barreta PintoJesús MartinezRobert Wallace Original Article 10 September 2019 Pages: 565 - 573
The Goodness Paradox: How evolution made us more and less violent, by Richard Wrangham William C. McGrew Book Review 20 September 2019 Pages: 575 - 576
Correction to: Shape variation in the facial part of the cranium in macaques and African papionins using geometric morphometrics Takeshi NishimuraNaoki MorimotoTsuyoshi Ito Correction 25 September 2019 Pages: 577 - 577
