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Number of species each correlative trait analysed.
| predictor variable | number of species |
|---|---|
| body mass | 279 |
| head–body length | 226 |
| inter-birth interval | 179 |
| litter size | 265 |
| geographical range area | 222 |
| age at first birth | 131 |
| home range | 147 |
| human population density | 222 |
| precipitation | 220 |
| temperature | 220 |
| AET | 219 |
| PET | 219 |
| habitat breadth | 291 |
