The Species Threat Abatement and Recovery Metric (STAR) measures the contribution that investments can make to reducing species extinction risk. It can help cities and other institutions target their investments to achieve conservation outcomes, and can measure the contributions these investments make to global targets such as the Sustainable Development Goals. It is based on the IUCN Red List of Threatened Species—the global standard for documenting species’ conservation status—and is fully additive and scalable.
Further information: https://www.iucn.org/regions/washington-dc-office/our-work/species-threat-abatement-and-recovery-star-metric