Schematic representation of the IUCN Invasive Species Specialist Group (ISSG) initial proposal of a post-2020 IAS target and the associated timeline. The target focusses on three key components – pathways, sites, and species (left to right) – and provides mid-term (2030) and long-term (2050) quantitative targets (cf. Table 1). For pathways, red arrows represent IAS pathways that are managed (50% in 2030 and 100% in 2050). For species the red area in the circle indicates the proportion of the most harmful IAS that are managed (50% in 2030 and 100% in 2050). For sites, filled red circles indicate priority sites that are managed (100% in 2030 and 2050). The proposed indicators to monitor progress are indicated at the bottom of the figure.