“Species roost at different heights”
Previously only one study had formally documented differences in roosting height between species (Table 2). This included record of black flying-foxes and grey-headed flying-foxes only, and did not provide measures of absolute height (rather, roosting in different quadrants of trees) (Welbergen 2005). From our new dataset, we observed segregation of species by roosting height, with black flying-foxes typically showing the highest roosting heights (average maximum height with interquartile range: 18.0, 14.6-21.0; average minimum height with interquartile range: 14.3, 11.3-17.2), followed by grey-headed (maximum: 15.1, 11.2-18.9; minimum: 12.6, 8.8-16.2), then little red flying-foxes (when present) (maximum: 11.4, 9.2-13.6; minimum: 8.8, 7.1-10.4) (Figure 7). Note, however, that topographical variation within roosts was not taken into consideration in measures of height. Differences in heights presented here reflect a relative difference in roosting heights from the ground within trees, but may not reflect true, realised height relative of the canopy.