We identified priority areas for species placed in the very high and high vulnerability categories by plotting the relative abundances of species across Great Britain using 509 WBBS survey locations.
A surface of abundances was created using kriging, specifying a Gaussian semi-variogram structure. Kriging assigns values to un-surveyed locations using a weighted moving average technique, with the statistical relationship between spatially correlated points specified using the semi-variogram model (de Smith et al., 2013).