Kochvar, K., Peters, S., Zipple, M. & Nowicki, S. (2021). Data from: Maturational changes in song sparrow song. Duke Research Data Repository. https://doi.org/10.7924/r47w6gq34
Caves, E. M., Green, P. A., Zipple, M. N., Peters, S., Johnsen, S., Nowicki, S. (2018). Data and scripts from: Categorical perception of colour signals in a songbird. Duke Digital Repository. https://doi.org/10.7924/r4rx96r99