Step 11: Use the initial lines as guides to draw his eyebrows. Make them thicker and more angular. Add a few lines in between them for Huey's perpetually furrowed brow.
Step 12: Draw his nose as two small curved lines, one for the tip of the nose and one for the nostril. Place the nose where the vertical construction line meets the bottom of the original square. Draw two more small curve lines under the nose for his mouth and lower lip.
Step 13: Use the initial square and triangle as guides to draw the outline of his face. Make the edges of the shapes rounder to give the face a more organic look. Draw a few angled lines on the left side of the face near the ear for his sideburn. Darken the lines that make up his neck.
Step 14: Draw the ears using the initial arcs as guides. Give the outer portion of the ears more bends and curves. Inside each ear, add a few lines to indicate the ears' structure.
Step 15: Use the circle around his head as a guide to draw his fro. Don't use smooth strokes for the fro. Follow the path of the circle but add the fro using a series of curved lines and angled arcs all round.