Red-headed vulture skull
Also known as King vulture, or Sarcogyps calvus.
A pretty fun one to draw with all the intertwining volumes and surfaces.
As usual, done on an iPad 2, with Sketchbook Pro, and a Wacom Bamboo stylus.
You should check it in big, as it features the version with the shadow layer.
And there's the rest of the series, obviously.
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