Habitat mean annual precipitation and mean annual temperature
The global distribution data for the geo-referenced species was extracted from the Global Biodiversity Information Facility (GBIF; http: //www.gbif.org/) site using the gbif function in R package (version 3.5.2) dismo (Hijmans & van Etten, 2012). Values for mean annual temperature (MAT) and mean annual precipitation (MAP) from 1970 to 2000 for all geo-referenced localities for each species were extracted from the WorldClim dataset (http: //www.worldclim.org/) using the extract function in R package raster (Hijmans & van Etten, 2012). The values were then averaged as the MAT and MAP value for a given species.