Previous Observances
- 2012 - Marine Biodiversity
- 2011 - Forest Biodiversity
- 2010 - Biodiversity, Development and Poverty Alleviation
- 2009 - Invasive Alien Species
- 2008 - Biodiversity and Agriculture
- 2007 - Biodiversity and Climate Change
- 2006 - Protect Biodiversity in Drylands
- 2005 - Biodiversity: Life Insurance for our Changing World
- 2004 - Biodiversity: Food, Water and Health for All
- 2003 - Biodiversity and Poverty Alleviation: Challenges for Sustainable Development
- 2002 - Forest Biodiversity