1. Tolerant macaque species are less impulsive and reactive

   • Louise Loyant
   • Bridget M. Waller
   • Marine Joly

   Original Paper Open access 28 May 2023 Pages: 1453 - 1466

   

2. The selfish preen: absence of allopreening in Palaeognathae and its socio-cognitive implications

   • Thomas Rejsenhus Jensen
   • Claudia Zeiträg
   • Mathias Osvath

   Original Paper Open access 31 May 2023 Pages: 1467 - 1476

   

3. Age-dependent winner–loser effects in a mangrove rivulus fish, Kryptolebias marmoratus

   • Cheng-Yu Li
   • Chun-Ying Pan
   • Yuying Hsu

   Original Paper 09 June 2023 Pages: 1477 - 1488

   

4. What do zebra finches learn besides singing? Systematic mapping of the literature and presentation of an efficient associative learning test

   • ChuChu Lu
   • Agnieszka Gudowska
   • Joanna Rutkowska

   Original Paper Open access 10 June 2023 Pages: 1489 - 1503

   

5. Chronic social comparison elicits depression- and anxiety-like behaviors and alterations in brain-derived neurotrophic factor expression in male rats

   • Bing Xue
   • Yin-Yan Ma
   • Jian-Jun Zhang

   Original Paper 11 June 2023 Pages: 1505 - 1519

   

6. Object use in communication of semi-wild chimpanzees

   • Violet Gibson
   • Sarah T. Boysen
   • Marina Davila-Ross

   Original Paper Open access 14 June 2023 Pages: 1521 - 1537

   

7. Mirror self-recognition in ghost crab (Ocypode quadrata)

   • Trent Robinson

   Original Paper 14 June 2023 Pages: 1539 - 1549

   

8. Left or right, that is the question: use of egocentric frame of reference and the right-eye advantage for understanding gestural signs in bottlenose dolphins (Tursiops truncatus)

   • Masaki Tomonaga
   • Yuka Uwano-Ito
   • Natsuko Sakurai

   Original Paper 15 June 2023 Pages: 1551 - 1569

   

9. Learning and organization of within-session sequences by pigeons (Columba livia)

   • Muhammad A. J. Qadri
   • Robert G. Cook

   Original Paper 19 June 2023 Pages: 1571 - 1587

   

10. Grey wolves (Canis lupus) discriminate between familiar and unfamiliar human voices

    • Beatrice Gammino
    • Vicente Palacios
    • Marco Gamba

    Original Paper 20 June 2023 Pages: 1589 - 1600

    

11. Inter-group alliance dynamics in Indo-Pacific bottlenose dolphins (Tursiops aduncus)

    • Whitney R. Friedman
    • Michael Krützen
    • Richard C. Connor

    Original Paper Open access 30 June 2023 Pages: 1601 - 1612

    

12. Penguins perceive variations of source- and filter-related vocal parameters of species-specific vocalisations

    • Francesca Terranova
    • Luigi Baciadonna
    • Livio Favaro

    Original Paper Open access 04 July 2023 Pages: 1613 - 1622

    

13. Llamas use social information from conspecifics and humans to solve a spatial detour task

    • Annkatrin Pahl
    • Uta König von Borstel
    • Désirée Brucks

    Original Paper Open access 06 July 2023 Pages: 1623 - 1633

    

14. Social information facilitates learning about novel food sources in adult flower-visiting bats

    • Andreas Rose
    • Marco Tschapka
    • Mirjam Knörnschild

    Original Paper Open access 08 July 2023 Pages: 1635 - 1642

    

15. Injury shortens life expectancy in ants and affects some risk-related decisions of workers

    • Filip Turza
    • Krzysztof Miler

    Original Paper Open access 14 July 2023 Pages: 1643 - 1647

    

16. Does social motivation mitigate fear caused by a sudden sound in horses?

    • Wiktoria Janicka
    • Izabela Wilk
    • Tomasz Próchniak

    Original Paper Open access 14 July 2023 Pages: 1649 - 1660

17. Singing more, singing harsher: occurrence of nonlinear phenomena in a primate’ song

    • Walter Cristiano
    • Teresa Raimondi
    • Cristina Giacoma

    Original Paper Open access 17 July 2023 Pages: 1661 - 1673

    

18. Slowly walking down to the more food: relative quantity discrimination in African spurred tortoises (Centrochelys sulcata)

    • Masaki Tomonaga
    • Daiki Haraguchi
    • Anna Wilkinson

    Original Paper Open access 21 July 2023 Pages: 1675 - 1683

    

19. Reward history modulates visual attention in an avian model

    • Ming-Ray Liao
    • Mason H. Dillard
    • Jessica L. Yorzinski

    Original Paper 21 July 2023 Pages: 1685 - 1695

    

20. Eggshell spots are an important cue for the egg retrieval behavior in two tit species

    • Jianping Liu
    • Laikun Ma
    • Wei Liang

    Original Paper 27 July 2023 Pages: 1697 - 1703

    

21. Increasingly cautious sampling, not the black colouration of unpalatable prey, is used by fish in avoidance learning

    • Mikołaj Kaczmarski
    • Jan M. Kaczmarek
    • Janusz Kloskowski

    Original Paper Open access 28 July 2023 Pages: 1705 - 1711

    

22. Family first! Influence of parental investment in Guinea pigs (Cavia porcellus) prosocial choices

    • Mathilde Lalot
    • Aude Bourgeois
    • Dalila Bovet

    Original Paper 01 August 2023 Pages: 1713 - 1732

    

23. Horses discriminate between human facial and vocal expressions of sadness and joy

    • Plotine Jardat
    • Océane Liehrmann
    • Léa Lansade

    Original Paper 06 August 2023 Pages: 1733 - 1742