Draw a Horse Head

This is a simple and effective way to draw a realistic horse head.

Steps

Look at a horse, or a photo of one, in order to capture details and determine proportion correctly.
Draw two circles, one larger and one smaller, down and to the side.
Lightly, using those circles as a guide, make the head and then when you are at the end of the top circle, move your pencil down and make the neck.
Draw an eye in the big circle, making sure it is in proportion with the head.

Draw
Draw a nostril in the smaller circle, keeping in mind that it should be the same size as the eye (in more of an oval shape). At the bottom of the small circle, draw a line all the way to the circle's end.
Erase your guide circles, leaving a little circle bump for the cheekbone of the horse.
Draw an ear by curving up the line, making a point, then curving back down. Repeat for the other side.
Draw the horse's forelock. Right in the center of the ears, move your pencil directly down to make its forelock. Next, go on the top neck, past the ears, and go down, making the lines as long as you want for the mane. Take care not to make it too even, in order to lend a realistic effect to the drawing.

Draw a circle with 2 lines jutting out.
Draw an ear and outline the start of it's head.
Draw the neck and an other ear.
Erase the circle and the lines you used at the beginning.
Add the mane.
Add the eye nose and mouth. Erase all lines that you think are not supposed to be there. Add color! You can add any color you want. To make it realistic you can look up horse colors online.