Uedesheimer Rheinbogen, Protected area in Neuss, Germany.

Uedesheimer Rheinbogen is a 108.95-hectare nature reserve on the left bank of the Rhine by the Fleher Brücke, east of Grimlinghausen and north of Uedesheim, both districts of Neuss. It lies at the site of the Rheinbogen waterworks and has been protected since 1987; most of it is also an FFH area. Its habitats include alder, ash and softwood floodplain forests, dry limestone grasslands, wet tall-herb stands and oxbow lakes.

The area received protection status in 1987 to preserve its natural habitats. Later, in 2003, additional measures were introduced to strengthen protection and ensure long-term conservation of its resources.

The name refers to the Rhine bend between the Grimlinghausen and Uedesheim districts of Neuss, near the Fleher Brücke bridge. Since 1987 the 108.95-hectare area has been a nature reserve, and most of it has also been an FFH site since 2004. The Landschaftsplan of 2003 names the meadow knapweed fritillary butterfly and the corncrake among the species to be protected.

Visitors should use marked paths to avoid disturbing sensitive ecosystems and protect the species living there. It works best to visit early in the day when wildlife is more active and fewer people are around.

The reserve shelters the Dunkler Wiesenknopf-Ameisenbläuling, a butterfly on North Rhine-Westphalia's Red List category 1, alongside the red kite and peregrine falcon. Among its plants are the yellow broomrape (Orobanche lutea) and two Kickxia speedwells, Kickxia elatine and Kickxia spuria.