Predictions of current climate suitability for Ae. albopictus. Maps of climatic suitability for Ae. albopictus using OW, OWAT and SIG (respectively maps a, b, and c) using observed climate data (1981–2010: left hand column) and CanRCM4 model output for a similar time period (1989–2010; right hand column). The colour scale below each map shows the value for each indicator, and for SIG the cut off at 66.69% and 64.64% is indicated by arrows. For the OW maps, climate of low suitability for Ae. albopictus is indicated by both yellow areas (where TJan is below 0°C and Pann is below 500 mm) and white areas (where both TJan is below 0°C or Pann is below 500 mm).