Data from: Why hibernate? Tests of four hypotheses to explain intraspecific variation in hibernation phenology

This dataset includes hibernation phenology (immergence date, emergence date, and hibernation duration) for northern Idaho ground squirrels (Urocitellus brunneus), along with data used as predictor variables in linear mixed-effects models designed to explain intraspecific variation in the three hibernation behaviors. Code for that lme analysis is also included. Also included in this dataset are body mass data for northern Idaho ground squirrels, the code used to generate predicted squirrel body mass curves, NDVI data for northern Idaho ground squirrel study sites, and the code used to generate predicted NDVI curves for those sites. The data files include metadata sheets to better explain the data and its collection.