We will take this illustration as a basis of drawing.
All pictures increase. At first we will draw here such skeleton as though the skeleton of the person flies in the sky as often show parachutists on a TV set, so they soar.
Now we do sketches of a beak, head, body and an arrangement of wings of the pterodactyl.
We draw wings, fish in a mouth, we erase auxiliary curves.
We study contours in more detail.
We apply shading on dark sites.
Farther we do shading, for more exact display of shadows address to the original of a picture. We draw water and part of the coast in the distance. And drawing of the pterodactyl is ready.