KBAs are identified by criteria that were developed through several years of consultation within the conservation community. These criteria provide a scientifically defensible and rigorous global standard against which sites can be proposed and identified as globally important for the long-term survival of biodiversity. Using them ensures that KBA identification is rigorous, transparent and consistent in different countries and over time.
Sites qualify as global KBAs if they meet one or more of 11 criteria, clustered into five higher level categories: threatened biodiversity, geographically restricted biodiversity, ecological integrity, biological processes, and irreplaceability. The KBA criteria can be applied to species and ecosystems in terrestrial, inland water, and marine environments, and may be applied across all taxonomic groups (other than micro-organisms).
The Global Standard for the Identification of Key Biodiversity Areas (IUCN 2016) sets out globally agreed criteria for the identification of KBAs worldwide.
The Guidelines for using A Global Standard for the Identification of Key Biodiversity Areas v1.1 help users apply the KBA Standard They explain the key terms, how to measure the criteria using different assessment parameters and how to delineate KBAs.
The following table summarises the KBA criteria. More can be found about these criteria under training materials.