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.