Data on first day of bare ground (snowmelt date, shown as day of year; 1 Jan = 1) from a long-term snow monitoring plot monitored by billy barr, near the mid-elevation study population described in the paper (The Rocky Mountain Biological Laboratory). snowmeltT1 refers to the date of melt in year t+

FASTA file of 21 MHC Class II Mimo-DRB alleles recovered from a wild population of montane vole (Microtus montanus). Samples were obtained between 2008-2010 near the Rocky Mountain biological Laboratory, located in the Upper East River Valley, CO (39N, 107W).