Danish Black White-Breasted Ducks are hardy ducks, and good egg layers and brooders.
They are mostly, however, raised for meat.
Males will up to 7.7 pounds (3.5 kg); females up to 6.6 pounds (3.0 kg.)
Sources
Scherf, Beate D., Editor. World Watch List for Domestic Animal Diversity. Rome: Food and Agriculture Organization of the United Nations. Second Edition. 1995. Page 192.