The study was conducted from February to July of 2014. We sampled for SNFM within the PNNCG using linear transects between 1800 and 2100 masl; on each linear transect we placed 100 Sherman traps and 3 pit fall traps. Each transect was surveyed for 10 consecutive nights in five different locations: mixed primary forest, mixed secondary forest, oaks forest, guacharos cave and the visitor center; each location was surveyed in three independent times, reaching a total of 150 sampling nights and an effort of 15.000 trap-nights. All individuals were measured and collected up to a series of 4 individuals for each species for posterior identification; individuals captured but not collected were marked and released.