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Environmental predictor contribution values.
| Environmental variable | Optimal scale (km) | Permutation importance (%) |
|---|---|---|
|
| ||
| All road traffic | 1 | 30.9 |
| Coniferous cover | 3 | 23.7 |
| Woodland cover | 3 | 20.3 |
| Pasture cover | 3 | 8.4 |
| Arable cover | 3 | 7.9 |
| Minor road traffic | 3 | 3 |
| Broadleaved woodland | 1 | 1.7 |
| B-road density | 3 | 1.1 |
| Improved grassland | 1 | 1 |
| Scrub cover | 3 | 0.8 |
| Rough grassland | 1 | 0.5 |
| Freshwater cover | 3 | 0.4 |
| Urban cover | 3 | 0.3 |
