Description
A path encircles this small nature reserve, though most views are limited to hedges and the reedbed edges. The former marsh area is gradually overgrowing and becoming bushy, while the wetland itself is undergoing eutrophication. This and the presence of the nearby hotspot Marais de Sionnet are the reasons why the Marais du Château does not receive much ornithological attention. However, over 120 recorded species include some noteworthy recent sightings.
As waterbirds such as different duck species, Dvergdykker, Vannrikse and Sivhøne become less common and harder to spot due to dense vegetation, the reedbeds and hedgerows have hosted Sørnattergal, Rødstjert, and Hekkspurv, with appearances of Pungmeis, Blåstrupe, and Gresshoppesanger during migration. The mature trees in the area provide habitat for Skogdue, Dvergspett, Mellomspett, Gjøk, and Pirol. The Spurvehauk also hunts here, and visits from Kattugle and even Hornugle, which nest sometimes in the region, are not excluded.
The higher elevation of the Marais offers a quieter alternative to Marais de Sionnet, along with its own intriguing birdlife. Pro Natura plans to further develop the site, with hopes of restoring the wetland’s appeal to waterbirds.
Details
Access
Choulex can be reached by bike or bus (No 33 stops at Choulex, village). There is also a parking at the Centre sportif (click on the map). The reserve can be visited on a small footpath, the best observation spot might be right at the entrance (1).

