Range shifts of overwintering birds depend on habitat type, snow conditions and habitat specialization

Data and R code accompanying the publication "Range shifts of overwintering birds depend on habitat type, snow conditions and habitat specialization" Bosco L, Xu Y, Deshpande P, Lehikoinen A 2022 --------- The data and code to calculate range shifts based on the center of gravity are provided here. The RData files contains raw data from the winter bird counts with added average snow depth values downloaded from open source databases (described in the paper), 100x100km grid info (grid ID, centroid coordinates and average (geographical) coordinates). The csv file contains the route lengths from the winter bird count transects per habitat type. The R file contains the R code used to clean the data (see methods in the publication) and calculate the habitat specific center of gravity (based on bird densities) which were used to calculate shift direction and distance.