Figure 2. Spatial distribution of data. Panel (a) shows the location of butterfly transect (n= 158) and moth traps (n = 93) where phenological data on the 289 species used in this study had been collected during 1999-2017 and 1993-2017 for the butterflies and moths , respectively. Panel (b) and (c) show the locations with observational data for T1 and T2, respectively, with samples size per coordinate depicted by different shades of green, on the 289 species used for calculating shifts in the northern range boundary. Longitude and latitude in the ETRS89 coordinate system. Also see Fig. S1 for the temporal span of the data sets used in this study.