Vultures as an overlooked model in cognitive ecology Thijs van OverveldDaniel SolJosé Antonio Donázar Review 24 November 2021 Pages: 495 - 507
Operant conditioning in antlion larvae and its impairment following exposure to elevated temperatures Krzysztof MilerInon Scharf Original Paper Open access 24 October 2021 Pages: 509 - 518
Innovative problem-solving in a threatened gull species, the Olrog’s Gull (Larus atlanticus) Melina Vanesa CastanoLaura Marina BiondiGermán Oscar García Original Paper 27 October 2021 Pages: 519 - 527
Behavioural factors underlying innovative problem-solving differences in an avian predator from two contrasting habitats Laura Marina BiondiGiselle FuentesMaria Susana Original Paper 28 October 2021 Pages: 529 - 543
Domestic dogs (Canis lupus familiaris) are sensitive to the correlation between pitch and timbre in human speech Sasha K. SturdyDavid R. R. SmithDavid N. George Original Paper Open access 29 October 2021 Pages: 545 - 554
Searching high and low: domestic dogs’ understanding of solidity Julia EspinosaEmma C. TecwynDaphna Buchsbaum Original Paper 29 October 2021 Pages: 555 - 570
Adjustment in the point-following behaviour of free-ranging dogs – roles of social petting and informative-deceptive nature of cues Debottam BhattacharjeeAnindita Bhadra Original Paper 06 November 2021 Pages: 571 - 579
Exploratory decisions of Trinidadian guppies when uncertain about predation risk Adam L. CraneEbony E. DemersGrant E. Brown Original Paper 06 November 2021 Pages: 581 - 587
Nest size matters: common cuckoos prefer to parasitize larger nests of Oriental reed warblers Longwu WangGangbin HeWei Liang Original Paper 12 November 2021 Pages: 589 - 595
Breed group differences in the unsolvable problem task: herding dogs prefer their owner, while solitary hunting dogs seek stranger proximity Enya Van PouckeAmanda HöglinLina S. V. Roth Original Paper Open access 18 November 2021 Pages: 597 - 603
Do sex differences in construction behavior relate to differences in physical cognitive abilities? Connor T. LambertGopika BalasubramanianLauren M. Guillette Original Paper 19 November 2021 Pages: 605 - 615
Does quantity matter to a stingless bee? Johanna EckertManuel BohnJohannes Spaethe Original Paper Open access 23 November 2021 Pages: 617 - 629
Overlooked evidence for semantic compositionality and signal reduction in wild chimpanzees (Pan troglodytes) Petar Gabrić Original Paper Open access 25 November 2021 Pages: 631 - 643
Context-dependent use of olfactory cues by foragers of Vespula germanica social wasps M. B. YossenM. ButelerM. Lozada Original Paper 28 November 2021 Pages: 645 - 655
Persistence is key: investigating innovative problem solving by Asian elephants using a novel multi-access box Sarah L. JacobsonAmanda PuitizaJoshua M. Plotnik Original Paper 28 November 2021 Pages: 657 - 669
Captivity and habituation to humans raise curiosity in vervet monkeys Sofia Ingrid Fredrika ForssAlba Motes-RodrigoErica van de Waal Original Paper Open access 02 December 2021 Pages: 671 - 682
Spaced training enhances equine learning performance Frederick R. HolcombKristi S. MulthaupSarah E. Daniels Original Paper Open access 03 December 2021 Pages: 683 - 690
Mirror-mediated string-pulling task in Eurasian jays (Garrulus glandarius) Luigi BaciadonnaFrancesca M. CorneroNathan J. Emery Original Paper Open access 16 December 2021 Pages: 691 - 700
An exploratory analysis of head-tilting in dogs Andrea SommeseÁdám MiklósiClaudia Fugazza Short Communication Open access 26 October 2021 Pages: 701 - 705
Correction to: Does inequity aversion depend on a frustration effect? A test with capuchin monkeys (Cebus apella) Alan SilberbergLara CrescimbeneElisabetta Visalberghi Correction 20 December 2021 Pages: 707 - 708
Correction to: Developing a feasible and sensitive judgement bias task in dairy cows Louise KremerCornelis G. van ReenenLaura E. Webb Correction 27 November 2021 Pages: 709 - 709
