• Country: 
  • Site number: 
  • Area: 
    514 ha
  • Designation date: 
  • Coordinates: 
    53°01'N 05°54'E
Materials presented on this website, particularly maps and territorial information, are as-is and as-available based on available data and do not imply the expression of any opinion whatsoever on the part of the Secretariat of the Ramsar Convention concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries.


Deelen. 07/01/93; Friesland; 514 ha; 53°02’N 05°55’E; Natura 2000 (SPA, SAC). The Ramsar Site, whose boundary has been adjusted to that of the Natura 2000 site, is one of the few remnants of an extensive peat bog landscape that once covered north-western Overijssel and Friesland. It is characterized by wet meadows, reedbeds, lakes and woodland. The Site is internationally important for endangered breeding birds such as bittern, purple heron and black tern, and it regularly supports more than 20,000 wintering waterbirds and more than 1% of the European populations of gadwall, shoveler and barnacle goose. It also plays a very important role in flood control and groundwater replenishment. Human activities include reed harvesting, farming, peat extraction, water management and recreation. The main threats to the Site’s ecological character derive from drainage and nutrient pollution from the surrounding farmland. The Dutch Bird Research Organisation SOVON coordinates a national bird monitoring programme at the Site. Ramsar site no. 579. Most recent RIS information: 2013.

Administrative region: 

  • National legal designation: 
    • Special Protection Area (Birds Directive 79/409/EEC, 1992) - Deelen
  • Regional (international) legal designations: 
    • EU Natura 2000
  • Last publication date: 


Ramsar Information Sheet (RIS)