Brewer's duck
The Brewer's duck is a hybrid between a mallard and a gadwall. John James Audubon painted a specimen, also referring to it as a Bemaculated Duck, a misspelling of "bimaculated".
A Brewer's duck
Audubon's painting
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Wikipedia
The Brewer's duck is a hybrid between a mallard and a gadwall. John James Audubon painted a specimen, also referring to it as a Bemaculated Duck, a misspelling of "bimaculated".
A Brewer's duck
Audubon's painting