The 40th anniversary of the Ai Project: the commemorative gift is a silk scarf painted by Ai the chimpanzee Tetsuro Matsuzawa Editorial 14 March 2017 Pages: 261 - 265
Chimpanzee Down syndrome: a case study of trisomy 22 in a captive chimpanzee Satoshi HirataHirohisa HiraiToshifumi Udono News and Perspectives 21 February 2017 Pages: 267 - 273
Interspecies sexual behaviour between a male Japanese macaque and female sika deer Marie PeléAlexandre BonnefoyCédric Sueur News and Perspectives 10 January 2017 Pages: 275 - 278
Tool use by Amazonian capuchin monkeys during predation on caiman nests in a high-productivity forest Kelly TorralvoRafael M. RabeloRobinson Botero-Arias News and Perspectives 09 March 2017 Pages: 279 - 283
Validation of a field-friendly extraction and storage method to monitor fecal steroid metabolites in wild orangutans Taufiq Purna NugrahaMichael HeistermannTony Weingrill Original Article 22 October 2016 Pages: 285 - 294
Status of urban populations of the long-tailed macaque (Macaca fascicularis) in West Sumatra, Indonesia Kurnia IlhamRizaldiYamato Tsuji Original Article 29 November 2016 Pages: 295 - 305
A first report of non-invasive adenovirus detection in wild Assamese macaques in Thailand Manakorn SukmakWorawidh WajjwalkuOliver Schülke Original Article 17 November 2016 Pages: 307 - 313
Relocation stress induces short-term fecal cortisol increase in Tonkean macaques (Macaca tonkeana) Carlo CinqueArianna De MarcoRoberto Cozzolino Original Article 30 November 2016 Pages: 315 - 321
Social implications of fission in wild Formosan macaques at Mount Longevity, Taiwan Minna J. HsuJin-Fu LinGovindasamy Agoramoorthy Original Article 02 January 2017 Pages: 323 - 334
Natural re-establishment of a population of a critically endangered primate in a secondary forest: the San Martin titi monkey (Plecturocebus oenanthe) at the Pucunucho Private Conservation Area, Peru Néstor AllgasSam ShaneeKarina Pinasco Original Article 31 October 2016 Pages: 335 - 342
A primate at risk in Northeast Brazil: local extinctions of Coimbra Filho’s titi (Callicebus coimbrai) Renato R. HilárioLeandro JerusalinskyStephen F. Ferrari Original Article 06 February 2017 Pages: 343 - 352
Run, hide, or fight: anti-predation strategies in endangered red-nosed cuxiú (Chiropotes albinasus, Pitheciidae) in southeastern Amazonia Adrian A. BarnettJoão M. SillaLiliam P. Pinto Original Article 23 January 2017 Pages: 353 - 360
Fatal attack on a Rylands' bald-faced saki monkey (Pithecia rylandsi) by a black-and-white hawk-eagle (Spizaetus melanoleucus) Dara B. AdamsSean M. Williams Original Article 08 February 2017 Pages: 361 - 365
Competition for dead trees between humans and aye-ayes (Daubentonia madagascariensis) in central eastern Madagascar Rose T. MillerJean-Luc RaharisonMitchell T. Irwin Original Article 15 November 2016 Pages: 367 - 375
Erratum to: Development and behavior of wild infant-juvenile East Bornean orangutans (Pongo pygmaeus morio) in Danum Valley Renata S. MendonçaTomoko KanamoriTetsuro Matsuzawa Erratum 06 January 2017 Pages: 377 - 377