Vanhooland, L-C., Szabó, A., Bugnyar, T., & Massen, J. J. M. (2022). A comparative study of mirror self-recognition in three corvid species. Animal Cognition.

Bhattacharjee, D., & Bhadra, A. (2022). Adjustment in the point-following behaviour of free-ranging dogs - roles of social petting and informative-deceptive nature of cues. Animal Cognition, 25(3), 571–579. 01573-6

Escribano, D., Doldán-Martelli, V., Cronin, K. A., Haun, D. B. M., van Leeuwen, E. J. C., Cuesta, J. A., & Sánchez, A. (2022). Chimpanzees organize their social relationships like humans. Scientific Reports, 12(1), 1-8. [16641].

Zijlmans, D. G. M., van den Berg, L. M., Langermans, J. A. M., & Sterck, E. H. M. (2022). Does behaviour predict weight gain during adulthood in captive group-living rhesus macaques? Applied Animal Behaviour Science, 256, 1-8. [105748].

Boucherie, P. H., Gallego-Abenza, M., Massen, J. J. M., & Bugnyar, T. (2022). Dominance in a socially dynamic setting: hierarchical structure and conflict dynamics in ravens' foraging groups. Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 377(1845), 1-12. [20200446].

Staes, N., Vermeulen, K., van Leeuwen, E. J. C., Verspeek, J., Torfs, J. R. R., Eens, M., & Stevens, J. M. G. (2022). Drivers of Dyadic Cofeeding Tolerance in Pan: A Composite Measure Approach. Biology, 11(5), 1-21. [713].

van Leeuwen, E. J. C., Bruinstroop, B. M. C., & Haun, D. B. M. (2022). Early Trauma Leaves No Social Signature in Sanctuary-Housed Chimpanzees (Pan troglodytes). Animals, 13(1).

Zwerts, J. A., Wiegers, J. N., Sterck, E. H. M., & Van Kuijk, M. (2022). Exploring spatio-temporal variation in soundscape saturation of an African tropical forest landscape. Ecological Indicators, 137, 1-10. [108712].

Kooros, S. J., Goossens, B., Sterck, E. H. M., Kenderdine, R., Malim, P. T., Ramirez Saldivar, D. A., & Stark, D. J. (2022). External environmental conditions impact nocturnal activity levels in proboscis monkeys (Nasalis larvatus) living in Sabah, Malaysia. American Journal of Primatology, 84(9), 1-13. [e23423].

Bagaria, M., Kuiper, L., Meijer, E., & Sterck, E. H. M. (2022). Individual behavioral correlates of tail biting in pre-finishing piglets. Frontiers in Veterinary Science, 9, 1-14. [1033463].

Goldsborough, Z., Sterck, E. H. M., De Waal, F. B. M., & Webb, C. E. (2022). Individual variation in chimpanzee (Pan troglodytes) repertoires of abnormal behaviour. Animal Welfare, 31(1), 125-135.

Schel, A. M., Bono, A., Aychet, J., Pika, S., & Lemasson, A. (2022). Intentional gestural communication amongst redcapped mangabeys (Cercocebus torquatus). Animal Cognition, 25(5), 1313-1330. 01615-7

Rox, A., Waasdorp, S., Sterck, E. H. M., Langermans, J. A. M., & Louwerse, A. L. (2022). Multigenerational Social Housing and Group-Rearing Enhance Female Reproductive Success in Captive Rhesus Macaques (Macaca mulatta). Biology, 11(7), 1-12. [970].

Kret, M. E., Massen, J. J. M., & De Waal, F. B. M. (2022). My Fear Is Not, and Never Will Be, Your Fear: On Emotions and Feelings in Animals. Affective Science, 3(1), 182-189.

Gallup, A. C., Schild, A. B., Ühlein, M. A., Bugnyar, T., & Massen, J. J. M. (2022). No Evidence for Contagious Yawning in Juvenile Ravens (Corvus corax): An Observational Study. Animals, 12(11), 1-12. [1357].

Zijlmans, D. G. M., Maaskant, A., Louwerse, A. L., Sterck, E. H. M., & Langermans, J. A. M. (2022). Overweight Management through Mild Caloric Restriction in Multigenerational Long-Tailed Macaque Breeding Groups. Veterinary Sciences, 9(6), 1-15. [262].

Šlipogor, V., Graf, C., Massen, J. J. M., & Bugnyar, T. (2022). Personality and social environment predict cognitive performance in common marmosets (Callithrix jacchus). Scientific Reports, 12(1), [6702]. 022-10296-8

Kluiver, C. E., de Jong, J. A., Massen, J. J. M., & Bhattacharjee, D. (2022). Personality as a Predictor of Time-Activity Budget in Lion-Tailed Macaques (Macaca silenus). Animals, 12(12), 1-22. [1495].

Miller, R., Lambert, M. L., Frohnwieser, A., Brecht, K. F., Bugnyar, T., Crampton, I., Garcia-Pelegrin, E., Gould, K., Greggor, A. L., Izawa, E-I., Kelly, D. M., Li, Z., Luo, Y., Luong, L. B., Massen, J. J. M., Nieder, A., Reber, S. A., Schiestl, M., Seguchi, A., ... Clayton, N. S. (2022). Socio-ecological correlates of neophobia in corvids. Current Biology, 32(1), 74- 85.e4.

Sterck, E. H. M., & Roth, T. S. (2022). Socioecology of Asian Colobines. In I. Matsuda, C. C. Grueter, & J. A. Teichroeb (Eds.), The Colobines: Natural History, Behaviour and Ecological Diversity (pp. 250-270). Cambridge University Press.

Massen, J. J. M., & Gallup, A. C. (2022). The evidence does not support long-term oxygenation as a functional explanation for the evolution of yawning. Sleep and Breathing.

Gielen, K., Louwerse, A. L., & Sterck, E. H. M. (2022). The Older the Better: Infanticide Is Age-Related for Both Victims and Perpetrators in Captive Long-Tailed Macaques. Biology, 11(7), [1008].

Rebout, N., Marco, A. D., Sanna, A., Micheletta, J., Lone, J-C., Berg, R. F. V. D., Sterck, E. H. M., Langermans, J. A. M., Thierry, B., & Lemasson, A. (2022). Tolerant and intolerant macaques differ in the context specificity of their calls and how they ‘comment’ on the interactions of others. Behavioral Ecology and Sociobiology, 76(5), 1-13. [67].

Sousa, T. R., Schietti, J., Ribeiro, I. O., Emílio, T., Fernández, R. H., ter Steege, H., Castilho, C. V., Esquivel-Muelbert, A., Baker, T., Pontes-Lopes, A., Silva, C. V. J., Silveira, J. M., Derroire, G., Castro, W., Mendoza, A. M., Ruschel, A., Prieto, A., Lima, A. J. N., Rudas, A., ... Costa, F. R. C. (2022). Water table depth modulates productivity and biomass across Amazonian forests. Global Ecology and Biogeography, 31(8), 1571-1588.

van Leeuwen, E. J. C., & Goldsborough, Z. (2022). What animal cultures may beget: Comment on "Blind alleys and fruitful pathways in the comparative study of cultural cognition" by Andrew Whiten. Physics of Life Reviews, 44, 99-101.


Bhattacharjee, D., & Bhadra, A. (2021). Adjustment in the point-following behaviour of free-ranging dogs–roles of social petting and informative-deceptive nature of cues. Animal cognition, 1-9.

Bhattacharjee, D., & Bhadra, A. (2021). Response to short-lived human overcrowding by free-ranging dogs. Behavioral Ecology and Sociobiology, 75(7), 1-8.

Brouwers, S., & Duchateau, M.J. (2021). Feasibility and validity of the Animal Welfare Assessment Grid to monitor the welfare of zoo-housed gorillas Gorilla gorilla gorilla. Journal of Zoo and Aquarium Research, 9, 208-217.

Diepstraten, J., & Willie, J. (2021). Assessing the structure and drivers of biological sounds along a disturbance gradient. Global Ecology and Conservation, 31, e01819.

Forest, P. N., Blundo, C., Carilla, J., Grau, R., Malizia, A., Malizia, L., Osinaga-Acosta, O., Bird, M., Bradford, M.,Catchpole, D., Ford, A., Graham, A., Hilbert, D., Kemp, J., Laurance, S., Laurance, W., Ishida, F. Y., Marshall, A., Waite, C., ... Tran, H. D. (2021). Taking the pulse of Earth's tropical forests using networks of highly distributed plots. Biological Conservation, 260, 1-27. 08849.

Gallup, A.C., Kret, M.E., Eldakar, O.T., Folz, J., & Massen, J.J.M. (2021). People that score high on psychopathic traits are less likely to yawn contagiously. Scientific Reports, 11, 23779. doi: 10.1038/s41598-021-03159-1 

Goldsborough, Z., Webb, C. E., De Waal, F. B. M., & Van Leeuwen, E. J. C. (2021). Zoo-housed female chimpanzee adopts local female-specific tradition upon immigrating into a new group. Behaviour, 158(6), 547-564.

Horn, L., Zewald, J.S., Bugnyar, T., & Massen, J.J.M. (2021). Carrion crows and azure-winged magpies show no prosocial tendencies when tested in a token exchange paradigm. Animals, 11, 1526. doi: 10.3390/ani11061526 

Laumer, I.B.*, Massen, J.J.M.*, Boehm, P.M., Boehm, A., Geisler, A. & Auersperg, A.M.I. (2021). Individual Goffin’s cockatoos (Cacatua goffiniana) show flexible targeted helping in a tool transfer task. PLoS One, 16, e0253416. doi: 10.1371/journal.pone.0253416   * co-first authors.

Martin, J.S., Koski, S.E., Bugnyar, T., Jaeggie, A.V. & Massen, J.J.M. (2021). Prosociality, social tolerance, and partner choice facilitate mutually beneficial cooperation in common marmosets. Animal Behaviour, 173, 115-136. doi: 10.1016/j.anbehav.2020.12.016 

Massen, J.J.M., Hartlieb, M., Martin, J.S., Leitgeb, E.B., Hockl, J., Kocourek, M., Olkowicz, S., Osadnik, C., Verkleij, J.W., Zhang, Y., Bugnyar, T., Němec, P. & Gallup, A.C. (2021). Brain size and neuron numbers drive differences in yawn duration across mammals and birds. Communications Biology, 4, 503. doi: 10.1038/s42003-021-02019-y

Massen, J.J.M. & Mielke, A. (2021). Third-party interactions. In: (J. Vonk & T.K. Shackelford eds.) Encyclopedia of Animal Cognition and Behavior. New York, USA: Springer Nature.

Pauwels, O. S. G., Zwerts, J., Bonnin, J. L., Boupoya-Mapikou , C-A., Albert , J-L., Dupeyras, P. A., Fourie, J., Ndonda Makemba, R., Ruizendaal, A. E., Vigna, C., & Vermeulen, C. (2021). Miscellanea Herpetologica Gabonica XVII. The Bulletin of the Chicago Herpetological Society, 56(5), 61-68.

Ramirez, J. I., Zwerts, J. A., van Kuijk, M., Iacobelli, P., Li, X., Herdoiza, N., & Jansen, P. A. (2021). Density dependence of daily activity in three ungulate species. Ecology and Evolution, 11(12), 7390-7398.

Rox, A., van Vliet, A. H., Langermans, J. A., Sterck, E. H., & Louwerse, A. L. (2021). A Stepwise Male Introduction Procedure to Prevent Inbreeding in Naturalistic Macaque Breeding Groups. Animals, 11(2), 545.

Schuller, B. W., Batliner, A., Bergler, C., Mascolo, C., Han, J., Lefter, I., Kaya, H., Amiriparian, S., Baird, A., Stappen, L., Ottl, S., Gerczuk, M., Tzirakis, P., Brown, C., Chauhan, J., Grammenos, A., Hasthanasombat, A., Spathis, D., Xia, T., ... Kaandorp, C. S. (2021). The INTERSPEECH 2021 Computational Paralinguistics Challenge: COVID-19 Cough, COVID-19 Speech, Escalation & Primates. 431-435. Paper presented at Interspeech 2021, Brno, Czech Republic.

Sigmundson, R., Stribos, M., Hammer, R., Herzele, J., Pflüger, L.S., & Massen, J.J.M. (2021). Exploring the cognitive capacities of Japanese macaques in a cooperation game. Animals, 11, 1497. doi: 10.3390/ ani11061497 

Šlipogor, V., Massen, J.J.M., Schiel, N., Souto, A. & Bugnyar, T. (2021). Temporal consistency and ecological validity of personality structure in common marmosets (Callithrix jacchus): a unifying field and laboratory approach. American Journal of Primatology, e23229. doi: 10.1002/ajp.23229 

Stocker, M, Prösl, J., Vanhooland, L-C., Horn, L., Bugnyar, T., Canoine, V.# & Massen, J.J.M.# (2021). Measuring salivary mesotocin in birds - Seasonal differences in ravens’ peripheral mesotocin levels. # both authors contributed equally. Hormones & Behaviour, 134, 105015. doi: 10.1016/j.yhbeh.2021.105015  

van Boekholt, B., van de Waal, E. & Sterck, E. H. (2021). Organized to learn: The influence of social structure on social learning opportunities in a group. iScience, doi: 102117.10.1016/j.isci.2021.102117

Visser, F., Keller, O.A., Oudejans, M.G., Nowacek, D.P., Kok, A.C.M., Huisman, J., Sterck, E.H.M. (2021). Risso’s dolphins perform spin dives to target deep-dwelling prey. Royal Society Open Science, 8, 202320.

Waasdorp, S., Tuffnell, J. A., Bruins-van Sonsbeek, L., Schilp, C. M., van Zeeland, Y. R., & Sterck, E. H. (2021). Chopped and dispersed food enhances foraging and reduces stress-related behaviours in captive white-naped mangabeys (Cercocebus lunulatus). Applied Animal Behaviour Science, 241, 105392.

Whytock, R. C., Świeżewski, J., Zwerts, J. A., Bara-Słupski, T., Koumba Pambo, A. F., Rogala, M., Bahaa-el-din, L., Boekee, K., Brittain, S., Cardoso, A. W., Henschel, P., Lehmann, D., Momboua, B., Kiebou Opepa, C., Orbell, C., Pitman, R. T., Robinson, H. S., & Abernethy, K. A. (2021). Robust ecological analysis of camera trap data labelled by a machine learning model. Methods in Ecology and Evolution, 12(6), 1080-1092.

Wijnen, M.N., Massen, J.J.M., & Kret, M.E. (2021). Gender bias in the allocation of student grants. Scientometrics. doi: 10.1007/s11192-021-03985-0 

Zewald J., Jacobs I. (2021) Object Permanence. In: Vonk J., Shackelford T. (eds) Encyclopedia of Animal Cognition and Behavior. Springer, Cham.

Zijlmans, D. G., Maaskant, A., Sterck, E. H., & Langermans, J. A. (2021). Retrospective Evaluation of a Minor Dietary Change in Non-Diabetic Group-Housed Long-Tailed Macaques (Macaca fascicularis). Animals, 11(9), 2749.

Zijlmans, D. G., Meijer, L., Vernes, M. K., Wubben, J. A., Hofman, L., Louwerse, A. L., Sterck, E. H. M., Langermans, J. A. M., & Stammes, M. A. (2021). Effect of Housing Conditions on Cortisol and Body Fat Levels in Female Rhesus Macaques. Biology, 10(8), 744.

Zijlmans, D. G. M., Vernes, M. K., Sterck, E. H. M., & Langermans, J. A. M. (2021). The utility of voluntary weighing in captive group-living rhesus macaques (Macaca mulatta). Animal Welfare, 30(3), 249-258.

Zijlstra, T. W., de Vries, H., & Sterck, E. H. (2021). Emotional bookkeeping and differentiated affiliative relationships: Exploring the role of dynamics and speed in updating relationship quality in the EMO-model. PloS one, 16(4), e0249519.

Zwerts, J. A., Stephenson, P. J., Maisels, F., Rowcliffe, M., Astaras, C., Jansen, P. A., Waarde, J., Sterck, L. E. H. M., Verweij, P. A., Bruce, T., Brittain, S., & Kuijk, M. (2021). Methods for wildlife monitoring in tropical forests: Comparing human observations, camera traps, and passive acoustic sensors. Conservation Science and Practice, [e568].

Zwerts, J. A., Treep, J., Kaandorp, C., Meewis, F., Koot, A. C., & Kaya, H. (2021). Introducing a Central African Primate Vocalisation Dataset for Automated Species Classification. 466-470. Paper presented at Interspeech, Brno, Czech Republic.


Gallup, A.G. & Massen, J.J.M. (2020). Intranasal oxytocin, empathy, and contagious yawning in dogs and humans. Applied Animal Behaviour Science, 224, 104971. doi: 10.1016/j.applanim.2020.104971

Gallup, A. C., Moscatello, L., & Massen, J. J. M. (2020). Brain weight predicts yawn duration across domesticated dog breeds. Current Zoology, 66(4), 401-405. DOI: 10.1093/cz/zoz060

Horn, L., Bugnyar T., Griesser, M., Hengl, M., Izawa, E.I., Oortwijn, T., Rössler, C., Scheer, C., Schiestl, M., Suyama, M., Taylor, A.H., Vanhooland, L.-C., von Bayern, A.M.P., Zürcher, Y. & Massen, J.J.M. (2020). Sex-specific effects of cooperative breeding and colonial nesting on prosociality in corvids. eLife, 9, e58139. doi: 10.7554/eLife.58139

Kret, M. E., Prochazkova, E., Sterck, E. H. M., & Clay, Z. (2020). Emotional expressions in human and non-human great apes. Neuroscience and Biobehavioral Reviews, 115, 378-395. DOI: 10.1016/j.neubiorev.2020.01.027

Laméris, D. W., Berlo, E., Sterck, E. H. M., Bionda, T., & Kret, M. E. (2020). Low relationship quality predicts scratch contagion during tense situations in orangutans (Pongo pygmaeus). American Journal of Primatology, 82(7). DOI: 10.1002/ajp.v82.7

Laméris, D. W., Tagg, N., Kuenbou, J. K., Sterck, E. H. M., & Willie, J. (2020). Drivers affecting mammal community structure and functional diversity under varied conservation efforts in a tropical rainforest in Cameroon. Animal Conservation, 23(2), 182-191. DOI: 10.1111/acv.12526

Laumer, I.B*, Massen, J.J.M.*, Lorck-Tympner, M., Wakonig, B., Carminito, C. & Auersperg, A.M.I. (2020). Tentative evidence for inequity aversion to unequal work-effort but not to unequal reward distribution in Goffin’e cockatoos. Ethology, 126, 185-194. doi: 10.1111/eth.12947. * co-first authors.

Massen, J.J.M. (2020). Editorial: Studying the evolution of cooperation and prosociality in birds (editorial). Ethology, 126, 121-124. doi: 10.1111/eth.13001.

Massen, J. J. M., Haley, S. M., & Bugnyar, T. (2020). Azure-winged magpies’ decisions to share food are contingent on the presence or absence of food for the recipient. Scientific Reports, 10(1), [16147]. DOI: 10.1038/s41598-020-73256-0

Massen, J. J. M., Schaake, W. A. A. & Bugnyar, T. (2020). A comparison of cooperative cognition in corvids, chimpanzees, and other animals. In: (L. Hopper & S. Ross eds.) Chimpanzees in context (pp. 368-390). Chicago, USA: University of Chicago Press.

Morales Picard, A., Mundry, R., Auersperg, A.M., Boeving, E.R., Boucherie, P.M., Bugnyar, T, Dufour, V., Emery, N.J., Federspiel, I., Gajdon, G., Guéry, J.-P., Hegedič, M., Horn, L., Kavanagh, E., Lambert, M.L., Massen, J.J.M., Rodrigues, M., Schiestl, M., Schwing, R., Szabo, B., Taylor, A.H., van Horik, J.O., von Bayern, A.M.P., Seed, A, & Slocombe, K.E. (2020). Why preen others? Predictors of allopreening in parrots and corvids and comparisons to grooming in great apes. Ethology, 126, 207-228. doi: 10.1111/eth.12999.

Overduin-de Vries, A. M., De Vries, H., Vermande, M. M., Reijntjes, A. H., & Sterck, E. H. (2020). Both aggressive and affiliative behaviour facilitate resource access in high-ranking female long-tailed macaques (Macaca fascicularis). Behaviour, 157(3-4), 267-287.

Rebout, N., De Marco, A., Lone, J.C., Sanna, A., Cozzolino, R., Micheletta, J., Sterck, E.H.M, Langermans, J.A., Lemasson, A. and Thierry, B., 2020. Tolerant and intolerant macaques show different levels of structural complexity in their vocal communication. Proceedings of the Royal Society B, 287(1928), p.20200439.

Roth, T. S., & Sterck, E. H. M. (2020). Social Vigilance of Friends and Foes in Western Lowland Gorillas (Gorilla gorilla gorilla). Animal Behavior and Cognition, 7(4), 537-555. DOI: 10.26451/abc.07.04

Sierro, J., Loretto, M.C., Szipl, G., Massen, J.J.M. & Bugnyar, T. (2020). Food calling in ravens (Corvus corax) revisited: who is addressed? Ethology, 126, 257-266. doi: 10.1111/eth.12991.

Stocker, M, Loretto, M.C., Sterck, E.H.M., Bugnyar, T. & Massen, J.J.M. (2020). Cooperation with closely bonded individuals reduces cortisol levels in long-tailed macaques. Royal Society Open Science, 7, 191056. doi:10.1098/rsos.191056

Van Berlo, E., Díaz-Loyo, A.P., Juárez-Mora, O.E., Kret, M.E. & Massen, J.J.M. (2020). Experimental evidence for contagious yawning in Bornean orangutans (Pongo pygmeus). Scientific Reports, 10, 22251. doi: 10.1038/s41598-020-79160-x

Vanhooland, L.-C., Bugnyar, T. & Massen, J.J.M. (2020). Crows (Corvus corone sp.) check the contingency of their behaviour in a mirror, yet fail to pass the Mirror-Mark Test. Journal of Comparative Psychology

Van Leeuwen, K. L., Matsuzawa, T., Sterck, E. H. M., & Koops, K. (2020). How to measure chimpanzee party size? A methodological comparison. Primates, 61(2), 201-212. DOI: 10.1007/s10329-019-00783-4

Vermande, M. M., & Sterck, E. H. M. (2020). How to Get the Biggest Slice of the Cake. A Comparative View of Social Behaviour and Resource Access in Human Children and Nonhuman Primates. Frontiers in Psychology, 11. DOI: 10.3389/fpsyg.2020.584815


De Marco, A., Rebout, N., Massiot, E., Sanna, A., Sterck, E. H., Langermans, J. A., ... & Lemasson, A. (2019). Differential patterns of vocal similarity in tolerant and intolerant macaques. Behaviour, 1(aop), 1-25.

Laméris, D. W., Tagg, N., Kuenbou, J. K., Sterck, E. H. M., & Willie, J. (2019). Drivers affecting mammal community structure and functional diversity under varied conservation efforts in a tropical rainforest in Cameroon. Animal Conservation.

Massen, J. J. M., Behrens, F., Martin, J. S., Stocker, M., & Brosnan, S. F. (2019). A comparative approach to affect and cooperation. Neuroscience and Biobehavioral Reviews, 107, 370-387.

Roth, T. S., Bionda, T. R., & Sterck, E. H. (2019). Duckling-catching by a zoo-housed western lowland gorilla (Gorilla gorilla gorilla). Journal of Zoo and Aquarium Research, 7(3), 144-148.

Rox, A., van Vliet, A. H., Sterck, E. H., Langermans, J. A., & Louwerse, A. L. (2019). Factors determining male introduction success and long-term stability in captive rhesus macaques. PloS one, 14(7), e0219972.

Sterck, E. H., Zijlmans, D. G., de Vries, H., van den Berg, L. M., van Schaik, C. P., & Langermans, J. A. (2019). Determining overweight and underweight with a new weight‐for‐height index in captive group‐housed macaques. American journal of primatology, e22996.

Zijlmans, D.G.M., & Duchateau, M.J.H.M. (2019). The effect of pack separation on social relationships and behaviour in captive African wild dogs (Lycaon pictus). Journal of Zoo and Aquarium Research, 7(1), 25.