Figure 1.

An example of typical (a) open and (b) closed territories. Circles indicate 150 m radius of area immediately surrounding the primary nest box and squares indicate the location of nest boxes. There is a higher density of nest boxes in open areas (e.g. nine versus three in (a) and (b), respectively). In (a), the two territories shown are multi-box while in (b), there is only one nest box in each male's territory.