UNEP-WCMC, with the financial support of the UN-REDD programme, has written a paper on biodiversity monitoring for REDD+ published in the journal "Current Opinion in Environmental Sustainability" this week. The paper observes the following three challenge to biodiversity monitoring for REDD+: choosing which aspects of biodiversity to monitor, the difficulty of attributing particular changes to REDD+ and the likely scarcity of resources for biodiversity monitoring. It proposes three responses which may address these challenges: 1) agreed policy targets that identify what should be monitored; 2) making links to existing biodiversity monitoring and to monitoring to estimate GHG emissions and removals; and 3) developing clear theories of change to assist in determining which changes in biodiversity can be attributed to REDD+. The paper is available on the journal website here.