1. Persistence in gestural communication predicts sociality in wild chimpanzees

   • Anna Ilona Roberts
   • Sam George Bradley Roberts

   Original Paper Open access 19 October 2018 Pages: 605 - 618

   

2. Transitive inference in pigeons may result from differential tendencies to reject the test stimuli acquired during training

   • Thomas R. Zentall
   • Daniel Peng
   • Luke Miles

   Original Paper 29 March 2019 Pages: 619 - 624

   

3. Speed–accuracy trade-off, detour reaching and response to PHA in Carib grackles

   • Simon Ducatez
   • Jean-Nicolas Audet
   • Louis Lefebvre

   Original Paper 30 March 2019 Pages: 625 - 633

   

4. What do wild saiga antelopes tell us about the relative roles of the two brain hemispheres in social interactions?

   • Andrey Giljov
   • Yegor Malashichev
   • Karina Karenina

   Original Paper 08 April 2019 Pages: 635 - 643

   

5. Inhibitory control and memory in the search process for a modified problem in grey squirrels, Sciurus carolinensis

   • Pizza Ka Yee Chow
   • Stephen E. G. Lea
   • Théo Robert

   Original Paper Open access 11 April 2019 Pages: 645 - 655

   

6. Discrimination learning and judgment bias in low birth weight pigs

   • Sanne Roelofs
   • Floor A. C. Alferink
   • Rebecca E. Nordquist

   Original Paper Open access 03 May 2019 Pages: 657 - 671

   

7. Flexible gaze-following in rhesus monkeys

   • Rosemary Bettle
   • Alexandra G. Rosati

   Original Paper 16 May 2019 Pages: 673 - 686

   

8. Experimental evidence for heterospecific alarm signal recognition via associative learning in wild capuchin monkeys

   • Brandon C. Wheeler
   • Martin Fahy
   • Barbara Tiddi

   Original Paper Open access 08 May 2019 Pages: 687 - 695

   

9. Sleep influences cognitive performance in lemurs

   • David R. Samson
   • Alexander Vining
   • Charles L. Nunn

   Original Paper 04 May 2019 Pages: 697 - 706

   

10. Can cattle visually discriminate between green and dead forages at a short distance while moving in the field?

    • Masahiko Hirata
    • Chie Arimoto
    • Hiroki Anzai

    Original Paper 24 May 2019 Pages: 707 - 718

    

11. Sharing playful mood: rapid facial mimicry in Suricata suricatta

    • Elisabetta Palagi
    • Elena Marchi
    • Francesca Bandoli

    Original Paper 21 May 2019 Pages: 719 - 732

    

12. Effects of set size on identity and oddity abstract-concept learning in rats

    • Lucia Lazarowski
    • Adam Goodman
    • Katherine Bruce

    Original Paper 30 May 2019 Pages: 733 - 742

    

13. Food caching in city birds: urbanization and exploration do not predict spatial memory in scatter hoarders

    • Megan J. Thompson
    • Julie Morand-Ferron

    Original Paper 03 June 2019 Pages: 743 - 756

    

14. Effects of breed group and development on dogs’ willingness to follow a human misleading advice

    • Shanis Barnard
    • Chiara Passalacqua
    • Emanuela Prato-Previde

    Original Paper 03 June 2019 Pages: 757 - 768

    

15. Ducklings imprint on chromatic heterogeneity

    • Antone Martinho-Truswell
    • Bethan McGregor
    • Alex Kacelnik

    Original Paper Open access 10 June 2019 Pages: 769 - 775

    

16. Identification of potential signature whistles from free-ranging common dolphins (Delphinus delphis) in South Africa

    • J. Fearey
    • S. H. Elwen
    • T. Gridley

    Original Paper 08 June 2019 Pages: 777 - 789

    

17. Innovative problem solving in great apes: the role of visual feedback in the floating peanut task

    • Sonja J. Ebel
    • Martin Schmelz
    • Josep Call

    Original Paper Open access 05 July 2019 Pages: 791 - 805

    

18. Spontaneous attention and psycho-physiological responses to others’ injury in chimpanzees

    • Yutaro Sato
    • Satoshi Hirata
    • Fumihiro Kano

    Original Paper 10 June 2019 Pages: 807 - 823

    

19. Positional encoding in cotton-top tamarins (Saguinus oedipus)

    • Elisabetta Versace
    • Jessica R. Rogge
    • Andrea Ravignani

    Original Paper Open access 01 July 2019 Pages: 825 - 838

    

20. Is the consonant bias specifically human? Long–Evans rats encode vowels better than consonants in words

    • Camillia Bouchon
    • Juan M. Toro

    Original Paper 19 June 2019 Pages: 839 - 850

    

21. What are the costs of learning? Modest trade-offs and constitutive costs do not set the price of fast associative learning ability in a parasitoid wasp

    • Maartje Liefting
    • Jessica L. Rohmann
    • Jacintha Ellers

    Original Paper Open access 20 June 2019 Pages: 851 - 861

    

22. Evidence for discrimination between feeding sounds of familiar fish and unfamiliar mammal-eating killer whale ecotypes by long-finned pilot whales

    • Charlotte Curé
    • Saana Isojunno
    • Patrick J. O. Miller

    Original Paper 22 June 2019 Pages: 863 - 882

    

23. Linear numerosity illusions in capuchin monkeys (Sapajus apella), rhesus macaques (Macaca mulatta), and humans (Homo sapiens)

    • Audrey E. Parrish
    • Michael J. Beran
    • Christian Agrillo

    Original Paper 29 June 2019 Pages: 883 - 895

    

24. Correction to: Linear numerosity illusions in capuchin monkeys (Sapajus apella), rhesus macaques (Macaca mulatta), and humans (Homo sapiens)

    • Audrey E. Parrish
    • Michael J. Beran
    • Christian Agrillo

    Correction 19 July 2019 Pages: 897 - 900

25. Cats match voice and face: cross-modal representation of humans in cats (Felis catus)

    • Saho Takagi
    • Minori Arahori
    • Kazuo Fujita

    Short Communication 10 May 2019 Pages: 901 - 906