A major role of natural history museums is to collect and steward natural history objects, generating knowledge regarding these objects and disseminating this knowledge to the community.
Natural history museums also engage the public to form deep bonds with the natural world and commit to its preservation.
Increased human activities have created catastrophic declines in biodiversity. Both ethics and logic point to a mandate to conserve vulnerable habitats and species. To achieve best practice, natural history museums take action to conserve natural habitats and populations.
– ICOM NATHIST, Taipei 2015
ICOM NATHIST 
Congratulations to this clear language and the defined focus of work for biodiversity of natural history museums!