Latvia has a long tradition of conservation. The first laws and regulations were promulgated in the 16th and 17th centuries. There are 706 specially state-level protected natural areas in Latvia: four national parks, one biosphere reserve, 42 nature parks, nine areas of protected landscapes, 260 nature reserves, four strict nature reserves, 355 nature monuments, seven protected marine areas and 24 microreserves. Nationally protected areas account for  or around 20% of Latvia's total land area. Latvia's Red Book (Endangered Species List of Latvia), which was established in 1977, contains 112 plant species and 119 animal species. Latvia has ratified the international Washington, Bern, and Ramsare conventions.