The Buckener Au () is a headstream of the

Bünzau Bünzau () is a river of Schleswig-Holstein, Germany. It flows into the Stör near Sarlhusen. See also *List of rivers of Schleswig-Holstein A list of rivers of Schleswig-Holstein, Germany: A * Aalbek, flowing through the Hemmelsdorfer ...

in the north German state of

Schleswig-Holstein Schleswig-Holstein (; da, Slesvig-Holsten; nds, Sleswig-Holsteen; frr, Slaswik-Holstiinj) is the northernmost of the 16 states of Germany, comprising most of the historical duchy of Holstein and the southern part of the former Duchy of Sch ...

. It is roughly long. The Buckener Au rises southwest of

Hohenwestedt Hohenwestedt (Low Saxon: Wiste') is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany. It is situated approximately 23 km south of Rendsburg, 25 km west of Neumünster and 40 km southwest of K ...

. Near Innien it unites with the Fuhlenau forming the Bünzau.

Heck cattle Heck cattle are a hardy breed of domestic cattle. These cattle are the result of an attempt by Heinz and Lutz Heck to breed back the extinct aurochs (''Bos primigenius'') from modern aurochs-derived cattle in the 1920s and 1930s. Controver ...

are grazed in the valley of the Au near

Aukrug Aukrug is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany. It is situated approximately 13 km west of Neumünster, and 35 km southwest of Kiel. Geography Aukrug is the seat of the ''Amt'' (colle ...

-Homfeld.