 | A fact from Rouen duck appeared on Wikipedia's Main Page in the Did you know column on 7 November 2006. The text of the entry was as follows:
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Two Types of Rouen ducks, at least in USA edit
According to Holderread, an American domestic duck breeder and conservationist, the two distinct types are the Production type (wild color, 6-8 lbs/2.75-3.5 kg, "normal" confirmation) and the "standard-bred" (huge block-shaped, 9-12 lbs/4-5.5 kg). - Holderread, Dave. Storey's Guide to Raising Ducks. North Adams, MA: Storey Communications, Inc., 2011, 2001