That's it for the guides! From this point on, press harder with your pencil for a more defined drawing.
Step 6: Inside the head, on the horizontal guide, lightly sketch two small ovals for the gorilla's eyes. Use the vertical line as a guide to help you determine the distance between the eyes. When you get the size and position of the eyes right, darken the shapes. Make the sides pointier for the corners of the eyes. The eye on the right should be a bit bigger. The shape of gorillas' eyes is similar to human eyes, so you can use a mirror and use your own eyes as reference. Draw a curved line over each eye for the crease on the eyelids. Draw a curved line under each eye for a wrinkle. The curved line at the top should be longer.
Step 7: Inside each eye, near the right, draw a couple of small lines for the irises. The gorilla's irises are supposed to be circles, but because of the eyelids, only the sides are visible. Inside each iris, off to the side, draw a tiny circle for highlights. In the middle of each iris, draw a dot for the pupils. The shapes inside the eye on the left should be a bit smaller than the eye on the right.
Step 8: Above the eyes, draw a series of short lines for the gorilla's thick brow. Don't draw these marks too high up; they should be close to the eyes. The markings don't have to look exactly like this. Just draw some lines above the eyes to indicate the brow. Between the eyes, draw a couple of short, curved lines for the bridge of the nose. Add a few more short lines in and around the bridge of the nose for wrinkles. Draw longer, curved lines below each eye for some bags under the eyes.
Step 9: Draw the nose inside the top half of the small circle. Lightly sketch a couple of short, curved lines for the nostrils. Follow the basic path of the circle to draw the outer edges of the gorilla's nose. Curve the lines at the top down so that the overall shape is a bit similar to a round letter M. Darken the curved lines in the middle to create the nostrils. Pay attention to the placement of the nostril in relation to the eyes. Draw a curved, broken line at the bottom to complete the shapes of the gorilla's nostrils. The shape of the nose should stay above the lower edge of the big initial circle.