README file for data sets accompanying the paper: ‘Same procedure as last year?’ Repeatedly tracked swifts show individual consistency in migration pattern in successive years by Wellbrock, A.H.J., Bauch, C., Rozman, J. and Witte, K. (2017) in Journal of Avian Biology 48, DOI: 10.1111/jav.01251, Dryad Digital Repository: Following abbreviations were used in the data files ‘PERMANOVA_data_within-analysis’ and PERMANOVA_data_between-analysis’ including geolocation data of repeatedly and/or singly tracked individuals for permutational multivariate analysis of variance. Abbreviations V1 longitude of the individual geographic position in degrees V2 latitude of the individual geographic position in degrees date Julian date (1 = 1st January) site -1 = breeding colony (departure), 100 = breeding colony (arrival), 0 = migration (not stationary), 1-12 = stationary periods at stopover site or wintering area numbered consecutively Ind individual coded as capital (A-J) year non-breeding season coded as 1 = 2012/2013, 2 =2013/2014 and 3 = 2014/15 (only in individual A) track track of the individual swift; 1 = first track and 2 = second track season season coded as A = autumn migration, W = wintering period and S = spring migration (for definition see main text) To use geographic position as dependent variable add at least 34 degrees to V1 and V2 because the function ‘adonis’ of the R-package ‘vegan’ only works with positive dependent variables. The most negative value of latitude (V2) was -33.85625599.