Zielfinger Vogelsee, nature reserve in Baden-Württemberg, Germany

The Zielfinger Vogelsee is a 45-hectare nature reserve designated in 1992, lying at 571 m on the Donau-Ablach-Platten about 5.2 km southwest of Mengen's centre. Its 33-hectare open water, reed beds and bare mud and gravel banks draw divers, ducks and waders, while an artificial steep bank holds kingfisher nest tunnels and a floating raft serves river terns.

The 45-hectare site was designated a nature reserve by the Tübingen regional council on 15 May 1992, under reserve number 4.202. It lies in the Rulfingen district of Mengen and in Sigmaringendorf, and forms part of the EU bird sanctuary "Baggerseen Krauchenwies/Zielfingen". The protection covers the flooded gravel pit as a breeding, feeding and resting habitat for birds and other species.

The lake lies in the Rulfingen district, and the name links the nearby village of Zielfingen with the birdlife protected here. The reserve forms part of the EU bird sanctuary "Baggerseen Krauchenwies/Zielfingen" (site 7921401), so the reed beds and mudflats are managed for breeding, feeding and resting birds rather than for recreation.

The area is accessible via small, well-maintained rural roads and suits day trips and brief visits. Walking paths along the shoreline are easy to navigate, allowing visitors to observe birds and explore nature at their own pace.

The lake is a former gravel pit dug by humans; the open water covers 33 of the reserve's roughly 45 hectares. Kingfishers accepted an artificially built steep bank for their nesting tunnels, and river terns took to a floating nesting raft. The site is part of the bird sanctuary "Baggerseen Krauchenwies/Zielfingen".