The Red List is a register over plants, animal and fungal species, which are under threat to become extinct. The indicator which are only calculated with longer intervals, are compiled at Aarhus University using the UN-definition (which are also used by IUCN, International Union for Conservation of Nature). The criteria for calculation are met as close as possible. The latest compiling of the indicator/index from 2019 is based on 5,523 species. The figure express to which extent the threatened species are protected, as a figure close to 1 means a high level of protection and a value closer to zero means low level of protection (regional extinct).