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Old gravel pit in the Seine River Valley that is good for ducks and other water birds in winter.
La Ferme de l'Isle is a lake area that can be very good in winter for ducks and allies. One of the most reliable sites for Smew in Ile de France. Recent rarities include Pink-footed Goose , Common Eider and Tundra Swan (Bewick's Swan).
By car only (train stations are very far away)
You can spot from the road or you can also walk along the path, and watch the other lake on the eastern part, and discover the nice alluvial forests of the Nature Reserve.