Figure 1.
Current and projected range of invasive cane toads in Australia. (a) Cane toads now inhabit approximately 1.2 million km2 of Australia (dark grey). (b) The predicted distribution of cane toads (black) based on annual maximum and minimum temperature, their squared terms, annual precipitation, precipitation×topographical variation, elevation, annual evaporation, minimum moisture index per cent built-up area and paved road density as estimated by model-averaged logistic regression at a data-derived threshold of 0.505. The future range area of cane toads predicted by this model (2.0 million km2) is almost triple the projections from the most recent model (0.7 million km2) based on its native limits (Sutherst et al. 1995).