Animal Cognition. SPRINGER HEIDELBERG Animal Cognition Varkevisser, J, How, M J, Riebel, K & al., E 2021, ' Adding colour-realistic video images to audio playbacks increases stimulus engagement but does not enhance vocal learning in zebra finches ', Animal Cognition, vol. 2021 . https://doi.org/10.1007/s10071-021-01547-8 Animal Cognition, 25(2), 249-274. Springer Varkevisser, J M, Simon, R, Mendoza, E, How, M, van Hijlkema, I, Jin, R, Liang, Q, Scharff, C, Halfwerk, W H & Riebel, K 2022, ' Adding colour-realistic video images to audio playbacks increases stimulus engagement but does not enhance vocal learning in zebra finches ', Animal Cognition, vol. 25, no. 2, pp. 249-274 . https://doi.org/10.1007/s10071-021-01547-8