This project contains all data, code, and step by step explanations for all analyses, figures and tables (including supplementary figures and tables) for **Kleisner, K., Leongómez, J.D., Pisanski, K., Fiala, V., Cornec, C., Groyecka, A., Butovskaya, M., Sorkowski, P., Reby, D., & Akoko, R.M. (2021). Predicting strength from aggressive vocalizations versus speech in African bushland and urban communities.** ***Philosophical Transactions of the Royal Society B: Biological Sciences, 376*(1840), 20200403. https://doi.org/10.1098/rstb.2020.0403**. All analyses were planned by [Juan David Leongómez](https://osf.io/s26ax/), [Katarzyna Pisanski](https://osf.io/p6gy3/), [Karel Kleisner](https://osf.io/w5cxn/) and [Vojtěch Fiala](https://osf.io/4pr7y/).