Part Three: More Detail
With the Draw A Polygon tool, add two polygons on either side of the face as shown. Use the Shift key to snap to points.

Validate.
Weld the five pieces and validate.

Close the object with the Close an object command.
With the Stretch tool and the Scale tool you can move the points around to sculpt even more. I rarely use any views other than the direct points of view when dealing with symmetry on a face or head. Any point moved on one side of the face should be moved in unison with the mirrored point.

The Scale tool is an excellent tool if you want to perform an operation such as moving the cheeks away from either side of the face. Select the relevant points with the view looking directly at the face. Hit the spacebar until you see the horizontal axis and drag out or in. Symmetry is intact.
As we earlier extruded the nostrils, do the same with the eye sockets. Shift /click each diamond plane with the Extrusion tool. Hit Return and pull out a little. Click and make the diamond shape smaller. Click and pull the extrusion into the head and validate. you might choose to practice this a few times.
Here is what we have so far.

At various points along the way, be sure to modify and sculpt the existing features.
With the Delete tool, remove the polygons above the eyes and validate.

You could also Tessellate these polygons. My goal is to keep the polygon count down to as few as necessary and still have flexibility to define areas. In this case, the area right above the eyes.
Select the Draw A Polygon tool and draw two new polygons like these. Use the Shift key to snap to points.

Validate and select the Weld tool and make everything one object.

Validate and close the object with the Close object command.
With the Stretch and Scale tools, move the points here to make a smaller, more square area like the red one shown here. This is where we will mount the ears. If you work from one side of the head, you can move the points mirrored on the other side of the head by selecting the points to be moved with the Lasso selector.

Use the Delete tool to delete the polygons we just modified. We will weld an ear to them later.

Validate.
Let's build an ear.

In the construction palette, roll over the sphere icon to bring the primitive objects into the window. Select the cube icon. In the workspace, click and drag to make a small cube and validate the action.

Resize the cube to look something like this one and validate.
With the Extrusion tool, shift/click the top and bottom. Hit return and pull the extrusions away from the cube.

Validate.
With the Stretch tool we are forming the rough shell of an ear.
Tessellate these two polygons with the first option and validate.

The large tessellated area on the left face of this object will be the opening of the ear. Note the point in the middle of the eight new polygons. We will later adjust it to form the opening of the ear.
Rotate the view to the other side of the ear by hitting the right arrow key a few times. Extrude the middle polygon on the other side of the ear to taper in once and then flare out.

Validate.
With the Stretch tool, push this point in towards the center of the ear for the hole.

Validate.
With the Move tool, position the ear in the area of the polygon we earlier deleted and validate.

Part Four: Fine Tuning