How is the head skin texture of the Red-headed Vulture (Sarcogyps calvus) described when contrasted with the Turkey Vulture's head?
Answer
Knobby and wrinkled appearance
When comparing the bare skin on the heads of the two species, a distinct difference in texture is noted. The adult Turkey Vulture's head skin is described as relatively smooth, ranging in color from pinkish-red to bright red. Conversely, the Red-headed Vulture (*Sarcogyps calvus*) exhibits a head where the skin texture is markedly different, often appearing knobby and wrinkled, lending it a different overall profile even though both feature red pigmentation.
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