Starting with your organic intersections, these are very well done. The linework is extremely confident, and the volume and solidity of the forms you've captured is extremely believable. Even as far as aesthetics goes, the juxtaposition of your underlying construction and the more emphasized line weight in some is remarkably pleasing, and develops a nice focal area. Of course that's irrelevant to the exercise, but still a nice touch worth pointing out.

I believe over the course of the whole set, you demonstrated a good deal of growth and improvement. There are issues smattered throughout, but towards the end you show that you've further developed your understanding of construction as a whole, and of how it applies to more organic creatures. You especially hit your stride when you attempt the more irregular subject matter - the crocodile, the frog, etc. The latter didn't look entirely like a poison dart frog (as you pointed out yourself), but the way you drew it, it does not make it seem like you yourself make the mistake. The drawing is believable, and convincingly captures something. I call that a win.

The hybrids were also very well constructed, and this is usually the major test to show whether or not a student has been able to learn construction well enough to really manipulate and change the references they're using. Just as with the frog, I think you've constructed fairly believable things here, so good work on that.

Now, slipping all the way back to the beginning, I'm going to point out some problems that stood out to me.

• For the wolf demo, the feet ended up sitting at entirely different levels. It can help a great deal to determine where the ground level is going to be beforehand, so you end up filling the legs in between these two predetermined heights rather than ending up with different feet sitting on inconsistent levels.

• I think these birds are a good start, though a small point I'm noticing is that the little additional masses you added around the base of their necks seem to just sit there, possibly liable to slip off the body, rather than properly wrapping around the underlying structure in a way that is grounded more solidly. When drawing the silhouette of these additional masses, always think about how it's going to really cling to that structure, and focus on making it a believable connection that wouldn't drop at the slightest movement.

• The biggest issue throughout your drawings that I noticed is that your approach to drawing fur is not terribly successful. From what I can see, you seem to be trying to rely a great deal on instinct - putting those chunks and spikes of fur where your gut tells you to put them, rather than slowing down and designing them more purposefully, while observing the kind of volume and mass that is present in your reference image. This results in lion's manes that fall a little flat, and really spiky fur that feels more like loosely connected lines. Keep in mind what is shown in these notes. Notice how every spike is not only designed in a specific, patient manner, but consider how they extend the silhouette of the underlying ball shape, and enclose that silhouette cleanly. As far as the silhouette of your fur goes, it tends to be more erratic and haphazard. Additionally, you seem to go for much larger spikes so you can cover everything with some kind of furry protrusion - instead, dont' be afraid to allow some sections just go smooth and flat. You don't need big spikes all over the place - put tufts in a few places, and the viewer's eye will assume the rest is fur even if it isn't sticking out.

• Where you place little additional masses along the joints of some of your animals' legs, you're doing fairly well, but again definitely push yourself just a little further to establish how the additional masses wrap around the sausage chains underneath, as shown here. Additionally, this demo shows other ways to wrap forms around an underlying structure to build out any desired bulk.

So! With that, I think I've outlined a number of areas where you can still stand to improve. That said, your work is coming along quite well. So, I'll go ahead and mark this lesson as complete.