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Description
The Altmühlsee is an artificial lake in Bavaria, created in the 1970s. It serves as a water reservoir and a destination for tourism. The Vogelinsel in the northeast and the extensively managed areas around it, particularly the Wiesmet, as well as the water bodies of the Seenland, attract numerous waterbirds that can also be observed on the lake.
In winter, when the water is not frozen, it becomes a popular area for Harle bièvre, Grèbe huppé, a group of Bernache du Canada, as well as Fuligule milouin, Fuligule morillon, and Canard siffleur. Among these, notable guests sometimes appear. In some years, Harle piette visit, and Garrot à oeil d'or are regularly observed. Harle huppé, Plongeon arctique, Plongeon catmarin, and even Plongeon imbrin have been recorded, although the chances of seeing those are better at Großer Brombachsee. Grande Aigrette appear along the shore in winter, and among the numerous Goéland leucophée and fewer Goéland pontique, some Goéland cendré can be discerned.
Spring and autumn migrations bring exciting visitors. The Bihoreau gris, which breeds on the Vogelinsel, can sometimes be observed in the bushes that line the rivers around the lake. Aigrette garzette sightings are possible, too. Guifette noire regularly hunt over the lake in April and May, and especially in late August and early September. Among these, the very similar, but rarer Guifette leucoptère and Guifette moustac are occasionally noted. Sterne arctique has been reported in some years. Mouette pygmée stay here in those months as well. From late August, few waders, including Bécasseau variable and rarely the Bécasseau sanderling, are occasionally feeding on the sandy beaches. Grèbe esclavon and Macreuse brune are scarce visitors mainly in late autumn, sometimes through to the winter months.
Rarities observed here include Mouette tridactyle, Harelde boréale, Phalarope à bec large, and Phalarope à bec étroit. Labbe parasite has been recorded four times, most recently in 2016. The exceptional sighting of a Mouette de Franklin in spring 2023 proves that the lake may always hold surprises.
Détails
Accès
Individual observation points can be reached on foot from the parking areas of the respective lake centers (Seezentren): The northeastern shore (1) from Seezentrum Muhr, the southern shore and the outlet structure (2) from Seezentrum Schlungenhof or the parking area at Höhe. These spots offer the best chances for observing gulls and terns. The western shore can be accessed from Seezentrum Wald (3). Further north, the northern edge of the Vogelinsel is visible; year-round, Pygargue à queue blanche can be spotted in the trees, and Balbuzard pêcheur during the warmer months. Much better than arriving by car is to cycle around the lake, possibly following an early morning visit to the Vogelinsel. The path around the lake is only accessible by bike and foot.
Paddle boats can be rented at the lake centers (please respect the nature reserve boundary of the Vogelinsel!). Motorboats are prohibited on the lake.
Terrain et Habitat
Arbres et buissons disséminés , Lac , PlageConditions
PlatBoucle
OuiAvez-vous besoin d'une longue-vue?
OuiSaison idéale pour observer
Toute l'annéeMeilleure période pour une visite
Hiver , Migration printanière , Migration automnaleItinéraire
Sentier large , Route pavéeNiveau de difficulté de l'itinéraire
FacileAccessible via
A pied , VéloObservatoire/hutte d'observation
NonInformations supplémentaires
The lake is used all year round for various sailing sports, which usually causes little disturbance to the birds. In summer it was a popular bathing area. However, due to phosphorus inputs from agriculture (40 tonnes per year) and climate change-induced warming of 4°C, cyanobacteria are increasingly spreading, making swimming impossible. It remains to be seen what impact this will have on bird life.
In winter, the lake surface may be frozen. Then it may be worth searching the surrounding fields for feeding Oie cendrée, Oie rieuse, Courlis cendré, and even rarer visitors.