Arato J, Fitch WT. Phylogenetic signal in the vocalizations of vocal learning and vocal non-learning birds. Philosophical Transactions of the Royal Society B: Biological Sciences. 2021 Okt 25;376(1836). 20200241. doi.org/10.1098/rstb.2020.0241

Carouso-Peck S, Goldstein MH, Fitch WT. The many functions of vocal learning. Philosophical Transactions of the Royal Society B: Biological Sciences. 2021 Okt 25;376(1836). 20200235. doi.org/10.1098/rstb.2020.0235

Vernes SC, Janik VM, Fitch WT, Slater PJB. Vocal learning in animals and humans. Philosophical Transactions of the Royal Society B: Biological Sciences. 2021 Okt 25;376(1836). 20200234. doi.org/10.1098/rstb.2020.0234

Sonnweber R, Stevens JMG, Hohmann G, Deschner T, Behringer V. Blood testosterone levels in sickness and in health: Male chimpanzee testosterone levels decrease in face of an immune challenge. American Journal of Primatology. 2021 Okt 18. 23334. doi.org/10.1002/ajp.23334

Ibáñez de Aldecoa P, de Wit S, Tebbich S. Can Habits Impede Creativity by Inducing Fixation? Frontiers in Psychology. 2021 Okt 13;12. 683024. doi.org/10.3389/fpsyg.2021.683024

Tebbich S, Schwemhofer T, Fischer B, Pike C. Darwin’s finches habitually anoint their feathers with leaves of the endemic tree Psidium galapageium during the non-breeding season. Ethology. 2021 Okt;127(10):914-924. doi.org/10.1111/eth.13153

Janisch J, Mitoyen C, Perinot E, Spezie G, Fusani L, Quigley C. Video recording and analysis of avian movements and behaviour: insights from courtship case studies. Integrative and Comparative Biology. 2021 Okt;61(4):1378–1393. doi.org/10.1093/icb/icab095

Savage PE, Loui P, Tarr B, Schachner A, Glowacki L, Mithen S et al. Toward inclusive theories of the evolution of musicality. Behavioral and Brain Sciences. 2021 Sep 30;44:132-140. doi.org/10.1017/S0140525X21000042

Ladich F. Shut up or shout loudly: Predation threat and sound production in fishes. Fish and Fisheries. 2021 Sep 13. doi.org/10.1111/faf.12612

Fischer S, Balshine S, Hadolt MC, Schaedelin FC. Siblings matter: Family heterogeneity improves associative learning later in life. Ethology. 2021 Sep 9;127: 897-907. doi.org/10.1111/eth.13196

Quigley C. Forgotten rhythms? Revisiting the first evidence for rhythms in cognition. European Journal of Neuroscience. 2021 Sep 8. doi.org/10.1111/ejn.15450

Wemer L, Hegemann A, Isaksson C, Nebel C, Kleindorfer S, Gamauf A et al. Reduced ectoparasite load, body mass and blood haemolysis in Eurasian kestrels (Falco tinnunculus) along an urban–rural gradient. Science of Nature. 2021 Sep 7;108(5). 42. doi.org/10.1007/s00114-021-01745-x

Wilkins AS, Wrangham RW, Fitch WT. The neural crest/domestication syndrome hypothesis, explained: reply to Johnsson, Henriksen, and Wright. Genetics: a periodical record of investigations bearing on heredity and variation. 2021 Sep 1;219(1). iyab098.

Adriaense J, Slipogor V, Hintze S, Marshall L, Lamm C, Bugnyar T. Watching others in a positive state does not induce optimism bias in common marmosets (Callithrix jacchus), but leads to behaviour indicative of competition. Animal Cognition. 2021 Sep;24:1039–1056. doi.org/10.1007/s10071-021-01497-1

Frigerio D, Sumasgutner P, Kotrschal K, Kleindorfer S, Hemetsberger J. From individual to population level: Temperature and snow cover modulate fledging success through breeding phenology in greylag geese (Anser anser). Scientific Reports. 2021 Aug 9;11(1). 16100. doi.org/10.1038/s41598-021-95011-9

Stöger-Horwath A, Baotic A. Vocal Creativity in Elephant Sound Production. Biology. 2021 Aug 5;10(8). 750. doi.org/10.3390/biology10080750

Nemeth M, Eisenschenk I, Engelmann A, Esser FM, Kokodynska M, Szewczak VF et al. Flaxseed oil as omega-3 polyunsaturated fatty acid source modulates cortisol concentrations and social dominance in male and female guinea pigs. Hormones and Behavior. 2021 Aug;134. 105025. doi.org/10.1016/j.yhbeh.2021.105025

Stocker M, Prosl J, Vanhooland L-C, Horn L, Bugnyar T, Canoine V et al. Measuring salivary mesotocin in birds - Seasonal differences in ravens' peripheral mesotocin levels. Hormones and Behavior. 2021 Aug;134. 105015. doi.org/10.1016/j.yhbeh.2021.105015

Pflüger LS, Pink KE, Wallner B, Radler C, Dorner M, Huffman MA. Twenty-three-year demographic history of the Affenberg Japanese macaques (Macaca fuscata), a translocated semi-free-ranging group in southern Austria. Primates. 2021 Jul 10. doi.org/10.1007/s10329-021-00928-4

Janisch J, Perinot E, Fusani L, Quigley C. Deciphering choreographies of elaborate courtship displays of golden-collared manakins using markerless motion capture. Ethology. 2021 Jul;127(7):550-562. doi.org/10.1111/eth.13161

Wenig K, Boucherie PH, Bugnyar T. Early evidence for emotional play contagion in juvenile ravens. Animal Cognition. 2021 Jul;24(4):717-729. doi.org/10.1007/s10071-020-01466-0

Maiditsch I, Ladich F. Acoustic and visual adaptations to predationrisk: A predator affects communication in vocalfemale fish. Current Zoology. 2021 Jun 19. zoab049.

Antonson ND, Rivera M, Abolins-Abols M, Kleindorfer S, Liu WC, Hauber ME. Early acoustic experience alters genome-wide methylation in the auditory forebrain of songbird embryos. Neuroscience Letters. 2021 Jun 11;755. 135917. doi.org/10.1016/j.neulet.2021.135917

Kislinger L, Kotrschal K. Hunters and Gatherers of Pictures: Why Photography Has Become a Human Universal. Frontiers in Psychology. 2021 Jun 8;12. 654474. doi.org/10.3389/fpsyg.2021.654474

Wenig K, Bach R, Czaczkes T. Hard limits to cognitive flexibility: ants can learn to ignore but not avoid pheromone trails. Journal of Experimental Biology. 2021 Jun 4;224(11). jeb242454. doi.org/10.1242/jeb.242454

Horn L, Zewald JS, Bugnyar T, Massen JJM. Carrion crows and azure-winged magpies show no prosocial tendencies when tested in a token transfer paradigm. Animals. 2021 Jun;11(6). 1526. doi.org/10.3390/ani11061526