Comparison of minimum winter temperatures
To document differences in minimum winter temperatures along the Massachusetts and Connecticut transects, daily minimum temperatures were extracted from PRISM daily minimum temperature rasters available from the PRISM Climate Group at http://prism.oregonstate.edu in ArcMap v. 10.7.1 (Esri Inc., West Redlands, CA) for each trap location along both transects from December 1st through March 31st from 2007-2018. At each trap, these results were then averaged to produce a mean of the yearly minimum temperatures across the twelve-year period. To determine whether there were differences between trap localities within a transect, and globally between the two transects, linear regression analyses were performed with the mean of the minimum temperatures as the response variable and distance and state as predictor variables in R.