Actually, many species of ducks have feet—and legs!—tinted a bluish green or gray. But for the ducks that do have orange feet, well, it's all about attracting the ladies. Chicks dig orange.
Duck with orange feet hi-res stock photography and images - Alamy
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Duck with orange feet hi-res stock photography and images - Alamy
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What Color Are Duck Feet And Why Are They That Color?
Duck with orange feet hi-res stock photography and images - Alamy
close up of a ducks orange feet Anatidae family showing the webbing used to aid the swimming process, Stock Photo, Picture And Rights Managed Image. Pic. YN7-1580787
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Maryland Bird Watchers' And Identification Group