Spatial distribution of deleterious impact evidence for the 11 alien parrot species in Europe, by a countries within Europe (n = 122) and b regions across the world (n = 316; Africa, Australia, Europe, Far East, Indian-subcontinent, Latin America, Middle East, North America). Evidence is further split by GISS impact category. Numbers refer to corresponding number of evidence entries, which include those from captivity. Parrot species occurrence data used to derive parrot species richness maps were taken from the Global Biodiversity Information Facility (GBIF, www.gbif.org).