Pearson correlation coefficients between variables potentially influencing woodpecker species richness, abundance and patch occupancy.

Significance values are given in parentheses. Statistically significant correlations are emboldened. Variable codes: Area – woodland patch area, ForCov – cover of forests within 2000 m from the patch boundary, CanOpen – tree canopy openness, Diagonal – mean diameter of trees, Deciduous – percentage of deciduous trees, Undergrowth – mean percentage shrub cover, DisCentr – distance to the city centre, Roads – density of roads within 500 m from the patch boundary, Settlement – percentage cover of human settlements within 500 m from the patch boundary, Urban – urbanization index.