Guinea fowl have many of the same basic external parts as chickens and turkeys. These parts include the eyes, ears, beak, wattle, hocks, and shanks. The helmeted guinea fowl, which is the most common species of guinea fowl, also has a bony protrusion on its head. In addition to this helmet, another characteristic particular to the guinea fowl is its head cap skin. Figures 1 and 2 show the external parts of a helmeted guinea fowl.
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Keeping guinea fowl, Jacquie Jacob and Tony Pescatore, University of Kentucky