Description
A visit to Dhünntalsperre is particularly worthwhile in winter, as many ducks hibernate on the reservoir. Every year, rarities such as Glitbrúsi, Himbrimi, Flórgoði, Sefgoði and Korpönd are reported in winter. A Grásvarri has overwintered on the clear-cut areas in recent years and Bláheiðir and Förufálki can also be observed in winter.
With a bit of luck, you may see Gjóður on migration. In summer Kolstorkur, Býþjór and Gunnfálki are among the area's highlights. The birds that can be observed all year round include Skúfönd, Hrafn, Fossbúi, Barrfinka and many more. Note that a scope is very helpful to ID the different species, that can be far away on the water body. If you dont want to hike 12 km you can go to the dam and watch birds from there. You can check what species were observed on Ornitho.de, choose NW and then GL to acess the district, where the reservoir is located.
Details
Access
The Dhünntalsperre is located in the Rheinisch-Bergischer Kreis, between the towns of Wermelskirchen, Wipperfürth, Kürten, and Odenthal in the Bergisches Land. It's the second-largest drinking water reservoir in Germany. This 12 km circular walk is located in the easternmost part of the reservoir and starts near the village of Hutsherweg. Press P on the map for directions to the parking.

