Spectrogram image of 3-minute averaged spectra extracted from the 2015 French colony 22 dataset, representing the occurrences of queen piping recorded within a colony with an original queen that was left unclipped and was left undisturbed throughout its swarming activities between 13th and 22nd April 2015. From: Ramsey, M., Bencsik, M., Newton, M.I. et al. The prediction of swarming in honeybee colonies using vibrational spectra. Sci Rep 10, 9798 (2020). https://doi.org/10.1038/s41598-020-66115-5