Dogs can infer implicit information from human emotional expressions Natalia AlbuquerqueDaniel S. MillsBriseida Resende Original Paper Open access 14 August 2021 Pages: 231 - 240
Odor-based mate choice copying in deer mice is not affected by familiarity or kinship Martin KavaliersIndra R. BishnoiElena Choleris Original Paper 16 August 2021 Pages: 241 - 248
Adding colour-realistic video images to audio playbacks increases stimulus engagement but does not enhance vocal learning in zebra finches Judith M. VarkevisserRalph SimonKatharina Riebel Original Paper Open access 17 August 2021 Pages: 249 - 274
Decision-making at the time of parasitism: cowbirds prefer to peck eggs with weaker shells Natalia A. CossaJuan C. ReboredaVanina D. Fiorini Original Paper 17 August 2021 Pages: 275 - 285
Friend or foe: Risso’s dolphins eavesdrop on conspecific sounds to induce or avoid intra-specific interaction Lucie Barluet de BeauchesneMathilde MassenetCharlotte Curé Original Paper 18 August 2021 Pages: 287 - 296
Preference and discrimination of facial expressions of humans, rats, and mice by C57 mice Shigeru WatanabeSayako MasudaCesario Borlongan Original Paper 21 August 2021 Pages: 297 - 306
Cowards or clever guys: an alternative nest defence strategy employed by shrikes against magpies Petr VeselýMichaela SyrováRoman Fuchs Original Paper 24 August 2021 Pages: 307 - 317
Changes in the anxiety-like and fearful behavior of shrimp following daily threatening experiences Kohji Takahashi Original Paper 28 August 2021 Pages: 319 - 327
Planning actions with a magnetic tool: how initial tool orientation and number of functional ends influence motor planning abilities in capuchin monkeys (Sapajus spp.) Gloria SabbatiniSara PallottiValentina Truppa Original Paper 28 August 2021 Pages: 329 - 345
Memory enhances problem solving in the fawn-footed mosaic-tailed rat Melomys cervinipes Misha K. RowellTasmin L. Rymer Original Paper 28 August 2021 Pages: 347 - 358
Recovery-from-extinction effects in an anuran amphibian: renewal effect, but no reinstatement James MesichAmanda ReynoldsFrédéric Laberge Original Paper 01 September 2021 Pages: 359 - 368
Cognition and the human–animal relationship: a review of the sociocognitive skills of domestic mammals toward humans Plotine JardatLéa Lansade Review 02 September 2021 Pages: 369 - 384
Comparing utility functions between risky and riskless choice in rhesus monkeys Philipe M. BujoldLeo Chi U. SeakSimone Ferrari-Toniolo Original Paper Open access 27 September 2021 Pages: 385 - 399
Seasonal changes in problem-solving in wild African striped mice Celine RochaisCarsten SchradinNeville Pillay Original Article 30 September 2021 Pages: 401 - 413
No evidence of spatial representation of age, but “own-age bias” like face processing found in chimpanzees Yuri KawaguchiMasaki TomonagaIkuma Adachi Original Paper Open access 02 October 2021 Pages: 415 - 424
Developing a feasible and sensitive judgement bias task in dairy cows Louise KremerCornelis G. van ReenenLaura E. Webb Original Paper Open access 11 October 2021 Pages: 425 - 445
Fish self-awareness: limits of current knowledge and theoretical expectations Pavla HubenáPavel HorkýOndřej Slavík Review 15 October 2021 Pages: 447 - 461
No coordination required for resources allocation during colony fission in a social insect? An individual-based model reproduces empirical patterns François LavalléeGuillaume ChérelThibaud Monnin Original Paper 19 October 2021 Pages: 463 - 472
Intra- and interspecific variation in self-control capacities of parrots in a delay of gratification task Désirée BrucksMatthew PetelleAuguste M. P. von Bayern Original Paper Open access 21 October 2021 Pages: 473 - 491
Correction to: Domestic cats (Felis catus) prefer freely available food over food that requires effort Mikel M. DelgadoBrandon Sang Gyu HanMelissa J. Bain Correction 18 August 2021 Pages: 493 - 493