Table 1.
Nineteen (19) variables used for mapping the global distribution of O. monoceros and O. rhinoceros with the code and units.
| Categories | Environmental variables | Code/unit | Data source |
|---|---|---|---|
| Climatic factors | Annual mean temperature | Bio1 (°C) | WorldClim version 2 |
| Mean diurnal range (mean of monthly (max temp–min temp)) | Bio2 (°C) | ||
| Isothermality (Bio2/Bio7) (× 100) | Bio3 (°C) | ||
| Temperature seasonality (standard deviation × 100) | Bio4 (°C) | ||
| Max temperature of warmest month | Bio5 (°C) | ||
| Min temperature of coldest month | Bio6 (°C) | ||
| Temperature annual range (Bio5-Bio6) | Bio7 (°C) | ||
| Mean temperature of warmest quarter | Bio8 (°C) | ||
| Mean temperature of coldest quarter | Bio9 (°C) | ||
| Annual precipitation | Bio10(mm) | ||
| Precipitation of wettest month | Bio11 (mm) | ||
| Precipitation of driest month | Bio12 (mm) | ||
| Precipitation seasonality (coefficient of variation) | Bio13 (mm) | ||
| Precipitation of wettest quarter | Bio14 (mm) | ||
| Precipitation of driest quarter | Bio15 (mm) | ||
| Geographical factors | Elevation (m) | Shuttle radar topography mission (SRTM) | |
| Vegetation | Global inventory modelling and mapping studies (GIMMS) group | ||
| Human factors | Land cover | International geosphere-biosphere programme (IGBP) | |
| Urban accessibility | European Commission Joint Research Center |