Just a little more advise: don't put too many details on the tusks. When you look into the sun, you only see the silhouette (something like that, sorry, I'm not English)
You can see the shape and lilltje cracks on them, but you can't see all the details you added.
Also the hairs on top of the heads... it's a little too much. Try to make them shorter and a little thinner. Then, it would be like a perfect picture.
Still, you are ripe to move on to intermediate. Just trying to give some advise, like this it's also very nice done!