Biosphere reserves are intended to implement the international monitoring programme of changes in biosphere and to carry out nature protection experiments in the representational natural complexes of natural zone and surrounding territories.

The following zones of this functional priority are distinguished in the biosphere reserves: conservation (strict nature reserves and reserves) and ecological protection priorities, as well as zones of experiments, restoration of ecosystems and economic activities characteristic to this territory. At present only the Žuvintas biosphere reserve is present in Lithuania.

Biosphere reserves:

Title Area, ha
Žuvintas biosphere reserve (2002-11-23) 18573,8