Brucks, D., Petelle, M. B., Baldoni, C., Krasheninnikova, A., Rovegno, E., & von Bayern, A. M. P. (2021). Intra- and interspecific variation in self-control capacities of parrots in a delay of gratification task. Animal Cognition. doi:10.1007/s10071-021-01565-6.