Grand Skinks Single Species Multi Season^M Ships with PRESENCE. Data has been collected on 352 tors over a 5 year (the ‘seasons’) period,^ although not all tors (rock piles) were surveyed each year, with up to 3 surveys^ of each tor per year. The 15 columns are in 5 blocks of 3. There is also a site-specific covariate Pasture indicating whether the surrounding^ matrix is either predominately the modified habitat (farm pasture, Pasture =1) or "native" grassland (tussock, Pasture = 0).