Under the following Criteria, Manas Wildlife Sanctuary is declared as MANAS World Heritage site: criteria (vii), (ix) and (x) of UNESCO

Exceptional Natural Beauty!
Criteria (vii): contain superlative natural phenomena or areas of exceptional natural beauty and aesthetic importance.

Significant Ongoing Environmental Processes
Criteria (ix): be outstanding examples representing significant ongoing ecological and biological processes in the evolution and development of terrestrial, freshwater, coastal and marine ecosystems and communities of plants and animals.

Most Important Natural Habitats
Criteria (x): contain the most important and significant natural habitats for in-situ conservation of biological diversity, including those containing threatened species of outstanding universal value from the point of view of science or conservation.