Fig. 4. Indicated breeding pairs (IBP) cumulative numbers (left column) and percentages (right column) plotted against percentage of nesting habitat undisturbed by timber harvest for both pre- and post-harvest periods. For example, 92 indicated breeding pairs of ground nesters, representing 16% of all pairs detected within 2000 m, had more than 60% of undisturbed nesting habitat for the pre-harvest period. These values changed to 141 IBP and 18%, respectively, post-harvest. P-values are that of the Mann-Whitney U-tests. It is worth noting that in all cases, curves of IBP raw counts were higher post-harvest than pre-harvest, and post-harvest relative counts (%) had a generally lower percentage of nesting habitat left undisturbed by timber harvesting than pre-harvest relative counts.