100 of the World's Worst Invasive Alien Species
100 of the World's Worst Invasive Alien Species is a list of invasive species compiled by the Global Invasive Species Database in 2014. The IUCN Invasive Species Specialist Group, which maintains the list, acknowledges that it is "very difficult to identify 100 invasive species from around the world that really are 'worse' than any others."Two criteria were used in selecting items for the list:
According to the ISSG, "only one species from each genus was selected.";Notes
