That's it for the guides! From this point on, press harder with your pencil for a more defined drawing.
Step 6: Draw a small circle inside the head, on the top, right side, for the cockatoo's eye. The eye should be very small in relation to the head. Add a tiny circle inside the eye for highlight. Draw a series of small, curved lines around the eye for the eyelid and wrinkles on the skin.
Step 7: To the right of the eye, draw a short, sloping line across the edge of the original circle for the base of the cockatoo's beak. To the right of the circle, draw a curved, vertical line for the top part of the beak. The curvature of the bird's beak should be parallel to the edge of the circle. To the left, draw a curved line that creates the beak's pointy tip. Below this shape, draw the bottom part of the beak using a couple of curved lines.
Step 8: On top of the beak, draw a long, curved, vertical line for the first part of the cockatoo's crest. Sketch lightly at first and only darken the line when you get the shape right. Add another line to the left so that you end up with a shape that is thick at the bottom and thin and pointy at the top. To the left, draw a couple of shorter, curved lines for more feathers on the bird's crest.
Step 9: Draw increasingly shorter, curved lines along the edge of the original circle for more feathers on the cockatoo's head. Darken the edges of the guides on the left side to create the back of the head. Draw a line under the beak for the neck and add a series of curved lines within the bird's head for feathers.