English to Portuguese Tech/Engineering Advertising / Public Relations

A basic axiom of targeted marketing communications is to “aim where the ducks are flying.” In other words, rather than shooting a gun wildly in the air and hoping that a duck might pass by, a duck hunter increases his or her odds of downing a duck if she or he refrains from shooting until flying ducks have been identified.
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Alguém sabe se existe uma tradução consagrada para este provérbio?
aim where the ducks are flying