1. Navigation and orientation in Coleoptera: a review of strategies and mechanisms

   • Elizabeth de Jongh

   Review 12 April 2021 Pages: 1153 - 1164

   

2. Long-term stability of vocal individuality cues in a territorial and monogamous seabird

   • Chiara Calcari
   • Cristina Pilenga
   • Livio Favaro

   Short Communication 10 May 2021 Pages: 1165 - 1169

   

3. Cryptic eggs are rejected less frequently by a cuckoo host

   • Longwu Wang
   • Gangbin He
   • Wei Liang

   Original Paper 24 March 2021 Pages: 1171 - 1177

   

4. Face-to-face configuration in Japanese macaques functions as a platform to establish mutual engagement in social play

   • Sakumi Iki
   • Toshikazu Hasegawa

   Original Paper 29 March 2021 Pages: 1179 - 1189

   

5. Effects of oxytocin administration and the dog–owner bond on dogs’ rescue behavior

   • Marina Victoria Dzik
   • Fabricio Carballo
   • Mariana Bentosela

   Original Paper 08 April 2021 Pages: 1191 - 1204

   

6. Male mice and cows perceive human emotional chemosignals: a preliminary study

   • Alexandra Destrez
   • Morgane Costes-Thiré
   • Benoist Schaal

   Original Paper 11 April 2021 Pages: 1205 - 1214

   

7. Cognitive enrichment device provides evidence for intersexual differences in collaborative actions in Indo-Pacific bottlenose dolphins (Tursiops aduncus)

   • Eszter Matrai
   • Shaw Ting Kwok
   • Ákos Pogány

   Original Paper 12 April 2021 Pages: 1215 - 1225

   

8. Nesting ecology does not explain slow–fast cognitive differences among honeybee species

   • Catherine Tait
   • Axel Brockmann
   • Dhruba Naug

   Original Paper 27 April 2021 Pages: 1227 - 1235

   

9. Irrational risk aversion in an ant

   • Massimo De Agrò
   • Daniel Grimwade
   • Tomer J. Czaczkes

   Original Paper Open access 03 May 2021 Pages: 1237 - 1245

   

10. Increased speed of movement reduced identification of Batesian ant-mimicking spiders by surrogate predators

    • Stano Pekár

    Original Paper 03 May 2021 Pages: 1247 - 1257

    

11. Dissociating the effects of delay and interference on dog (Canis familiaris) working memory

    • Sarah Krichbaum
    • Lucia Lazarowski
    • Jeffrey S. Katz

    Original Paper 05 May 2021 Pages: 1259 - 1265

    

12. Learning about construction behaviour from observing an artefact: can experience with conspecifics aid in artefact recognition?

    • Andrés Camacho-Alpízar
    • Tristan Eckersley
    • Lauren M. Guillette

    Original Paper 06 May 2021 Pages: 1267 - 1277

    

13. Emergence of complex dynamics of choice due to repeated exposures to extinction learning

    • José R. Donoso
    • Julian Packheiser
    • Sen Cheng

    Original Paper Open access 12 May 2021 Pages: 1279 - 1297

    

14. Trace conditioning as a test for animal consciousness: a new approach

    • Paula Droege
    • Daniel J. Weiss
    • Victoria Braithwaite

    Original Paper 13 May 2021 Pages: 1299 - 1304

    

15. The effects of food limitation on behavior, corticosterone, and the use of social information in the red crossbill (Loxia curvirostra)

    • Megan C. Wurtz
    • Victoria Cussen
    • Jamie M. Cornelius

    Original Article 28 May 2021 Pages: 1305 - 1317

    

16. An initial exploration of mirror behaviour in the ferret, Mustela putorius furo

    • Vinyza Dhanbhoora
    • Richard Corrigan
    • V. Tamara Montrose

    Original Paper 04 June 2021 Pages: 1319 - 1327

    

17. The effect of dimensional reinforcement prediction on discrimination of compound visual stimuli by pigeons

    • O. V. Vyazovska

    Original Paper 05 June 2021 Pages: 1329 - 1338

    

18. Kea (Nestor notabilis) show flexibility and individuality in within-session reversal learning tasks

    • Monika Laschober
    • Roger Mundry
    • Raoul Schwing

    Original Paper Open access 10 June 2021 Pages: 1339 - 1351