There was an error published in J. Exp. Biol. 215, 922-933.

In Figs 4, 5, 6, some of the bars were incorrectly assigned as daily data instead of monthly data and vice versa. The corrected figures appear below.

The authors apologise for any inconvenience that this error may have caused but assure readers that this doesn’t affect the results, interpretations or conclusions of the paper.