Marbled Duck
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Marmaronetta angustirostris
Marbled Ducks are confined only to Spain.
Few British records, most probably refers to escapes from captivity.
The Female averages smaller than the Male, but otherwise the sexes are alike.
Juveniles are similar but with more off-white blotches.
In flight, the wings look pale without a marked pattern, and no speculum on the secondaries.