Table 1.
Pairwise Spearman's rank correlation statistics between the densities over 142 census sites for the complete species set and several subsets of species
| Species | N | Average | SD | |
| All species | 79 | 3,081 | 0.0334 | 0.232 |
| Row shuffled (randomized) | 79 | 3,081 | 0.0244 | 0.082 |
| Fully shuffled (randomized) | 79 | 3,081 | −0.0014 | 0.086 |
| Warblers | 20 | 190 | 0.0654 | 0.201 |
| Vireos | 5 | 10 | −0.002 | 0.241 |
| Woodpeckers | 7 | 42 | 0.088 | 0.213 |
| Flycatchers | 5 | 10 | 0.006 | 0.174 |
| Woodpeckers × warblers | 7 × 20 | 140 | −0.010 | 0.215 |
N refers to the number of pairwise comparisons among species used to calculate the observed average correlation and the SD of the distribution of correlations.