From Heraldry of the World
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Civic heraldry of Denmark - Danmarks Kommunevåbener
The arms were officially granted in 1976.
The arms show a black grouse, a typical bird found in the region, but now extinct. The division line symbolises the two former municipalities Frederiks and Karup. The black symbolises the moors, the silver the Karup river. The grouse was also part of the former Viborg Amt.
Literature : Achen, 1982