Fig. 3. Example of a harvested plot (partial) with all IBP locations of a single survey year, as well as an example of an IBP (black star) with its 1-km radius circle. For that particular IBP, the percentage of nesting habitat undisturbed by timber harvesting was 47% for ground-nesting species and 45% for cavity-nesting species (see Methods for details on definition of nesting habitat). Clear-cut areas used for these calculations are the same for pre- and post-harvest periods.