Data and code for Dunn et al. 'Developmental history, energetic state and choice impulsivity in European starlings, Sturnus vulgaris' The r script allows you to carry out all the analyses reported in the paper. Data from the experiment reported in the paper are 'databybird.csv'. In the paper, we also compare the findings of the present experiment with findings from a study of risk preference in the same birds (Andrews et al. 2018), and two earlier studies of impulsivity in different birds (Bateson et al. 2015, Nettle et al. 2015) . For convenience, we have included the relevant data from those earlier studies here too, though those data are all already published in association with the primary paper on those experiments. This version has a revised R script which tweaked some of the analyses in response to peer review.