1. Observation and publication of infrequently observed behavior

   • Naofumi Nakagawa

   Editorial 12 June 2021 Pages: 549 - 554

   

2. First report of a leopard (Panthera pardus)–bonobo (Pan paniscus) encounter at the LuiKotale study site, Democratic Republic of the Congo

   • Nicolas Corredor-Ospina
   • Melodie Kreyer
   • Barbara Fruth

   News and Perspectives Open access 05 May 2021 Pages: 555 - 562

   

3. The attitude of people towards Anubis baboon (Papio anubis) crop foraging activities in sub-Saharan Africa, southern Ethiopia

   • Tamirat Gataro
   • Wondimagegnehu Tekalign

   Original Article 24 April 2021 Pages: 563 - 570

   

4. Wild geladas (Theropithecus gelada) in crops—more than in pasture areas—reduce aggression and affiliation

   • Marta Caselli
   • Anna Zanoli
   • Ivan Norscia

   Original Article Open access 01 June 2021 Pages: 571 - 584

   

5. Evaluation of an enrichment programme for a colony of long-tailed macaques (Macaca fascicularis) in a rescue centre

   • Valeria Albanese
   • Michela Kuan
   • Giovanna Marliani

   Original Article Open access 11 April 2021 Pages: 585 - 593

   

6. Assessing the reliability of an automated method for measuring dominance hierarchy in non-human primates

   • Sébastien Ballesta
   • Baptiste Sadoughi
   • Hélène Meunier

   Original Article 13 April 2021 Pages: 595 - 607

   

7. Physiological variation in Japanese macaques (Macaca fuscata) housed in different outdoor cages evaluated using the metabolic profile test

   • Akihisa Kaneko
   • Masaki Takasu
   • Munehiro Okamoto

   Original Article 18 May 2021 Pages: 609 - 615

   

8. The history, taxonomy, and geographic origins of an introduced African monkey in the southeastern United States

   • Deborah M. Williams
   • Sandra M. Almanza
   • Kate M. Detwiler

   Original Article 08 May 2021 Pages: 617 - 627

   

9. Gastrointestinal parasites of endemic and endangered free-ranging purple-faced leaf monkey (Semnopithecus vetulus) in Sri Lanka: effect of host group size and habitat type

   • Lakshani Weerasekara
   • Kumudu Wijesooriya
   • Jayantha Rajapakse

   Original Article 26 March 2021 Pages: 629 - 635

   

10. High levels of infant handling by adult males in Rwenzori Angolan colobus (Colobus angolensis ruwenzorii) compared to two closely related species, C. guereza and C. vellerosus

    • Samantha M. Stead
    • Iulia Bădescu
    • Julie A. Teichroeb

    Original Article 15 April 2021 Pages: 637 - 646

    

11. Anthropogenic edges impact howler monkey (Alouatta palliata) feeding behaviour in a Costa Rican rainforest

    • Laura M. Bolt
    • Dorian G. Russell
    • Amy L. Schreier

    Original Article 01 April 2021 Pages: 647 - 657

    

12. Wild robust capuchin monkey interactions with sympatric primates

    • Tiago Falótico
    • Olivia Mendonça-Furtado
    • Michele P. Verderane

    Original Article 04 May 2021 Pages: 659 - 666

    

13. Population and genetic structure of a male-dispersing strepsirrhine, Galago moholi (Primates, Galagidae), from northern South Africa, inferred from mitochondrial DNA

    • Metlholo A. Phukuntsi
    • Morne Du Plessis
    • Antoinette Kotze

    Original Article 28 April 2021 Pages: 667 - 675