Extended Data Fig. 3: Comparison of potential and observed range size for the three groups of old trees.

The observed range size refers to the number of grid cells in which a species has been observed to occur. Boxplots in show the median (centre line), 25th and 75th quartiles (hinges), 1.5 times the interquartile range from the hinges (whiskers) and values outside 1.5 times the interquartile range (points).