de Jong, M., Caro, S. P., Gienapp, P., Spoelstra, K., & Visser, M. E. (2017). Early Birds by Light at Night: Effects of Light Color and Intensity on Daily Activity Patterns in Blue Tits. Journal of Biological Rhythms, 32(4), 323-333. DOI: 10.1177/0748730417719168
The file 'Activity12.csv' and 'Activity14.csv' contain activity data - the daily start of activity (Onset), the daily end of activity (Offset), and the total activity during the full day cycle and the activity during nighttime (TotalAct resp NoctAct).
The data in file 'Activity12.csv' were collected in 2012, and in file 'Activity14.csv' in 2014, see paper.
the 'indidvuduals' file contains details on the individual birds.