Sangweiher
Udler
Extensive renaturation measures have breathed new life into the Sangweiher and the nature and bird reserve of the same name near Daun between Schalkenmehren and Udler.
The fact that the Sangweiher is an old maar was only recognized a few years ago when ejecta materials were found north and south of the pond. In the Middle Ages, the two streams flowing through the pond were dammed up and the resulting lake of about ten hectares was used for fish farming.
In the 19th century the lake was drained again and the area was used for agriculture. In the eighties, the original condition was restored and the area around the Sangweiher was declared a nature reserve. Around the maar sedge and rush stands as well as wet meadows developed. Thus, the Sangweiher is an important habitat for many bird species. Two bird watching stations hidden between trees on the shore are much frequented.
The cormorant and the rare red kite have their hunting and feeding grounds there.