Data Zone
Country/territory: Denmark
IBA criteria met: A4i, A4iii, B1i, B2, B3, C2, C3, C4, C6 (2000)
For more information about IBA criteria, please click here
Area: 6,520 hectares (65.20 km2)
| IBA conservation status | |||
|---|---|---|---|
| Year of assessment (most recent) | State (condition) | Pressure (threat) | Response (action) |
| 2010 | very poor | high | low |
| For more information about IBA monitoring, please click here | |||
Site description (2000 baseline)
A large area of reclaimed land with meadows along the Vidåen river. In the western part a saltwater lagoon is maintained by pumping in seawater. The inner (eastern) parts are mainly agricultural and the outer (western) parts predominantly pasture. There is also some standing freshwater, notably Rudbøl Sø, and reedbeds.
Key biodiversity
This is a very important staging area for several waterbirds, with total numbers exceeding 20,000 individuals. Several species listed on Annex I of the EC Birds Directive breed at the site, including Botaurus stellaris, Ciconia ciconia, Circus aeruginosus, Circus pygargus, Porzana porzana, Recurvirostra avosetta, Sterna hirundo, S. paradisaea, S. albifrons, Chlidonias niger (the most important site in Denmark for this species) and Luscinia svevica.
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tøndermarsken, Magisterkog and Rudbøl Sø (Denmark). Downloaded from
https://datazone.birdlife.org/site/factsheet/tøndermarsken-magisterkog-and-rudbøl-sø-iba-denmark on 23/12/2024.