overlaps area of protected biodiversity key biodiversity area Ramsar Sites The selection process which determines the whether an area is an important site must follow the best practice specifications and guidelines developed by the International Union for Conservation of Nature (IUCN), using globally standardised criteria and thresholds. Note that the label 'important site' is chosen to align with SDGIO. The definition is that of "key biodiversity area". Important Mammal Area Prime Butterfly Area Ecologically and Biologically Significant Area important site Alliance for Zero Extinction Sites IUCN Important Site for Freshwater Biodiversity envoPolar Important Bird Area Important Plant Area The narrow synonyms will be made into subclasses in their own right. An environmental zone which contains, as determined by an officially mandated selection process, one or more ecosystems which include, as parts, ecological communities of global significance for conservation due to their vulnerability and irreplaceability. Important Site for Freshwater Biodiversity ecosystem