The Buff Orpington duck, sometimes called the Buff duck, is of English
origin. The color should be buff or it is sometimes described as seal brown
or rich fawn. These ducks should follow the Pekin
in size and shape.
Reference:
All Breeds of Poultry, Origin: History: Description, Mating and Characteristics,
by Frank L. Platt. Published by AMERICAN POULTRY JOURNAL, Chicago, Illinois.