Overall, you're doing a pretty good job! There are some important points I do want to sort out, but all in all you are moving in the right direction.

Starting with your organic intersections, it seems you're thinking a great deal about how these forms interact with one another in space, as well as how their shadows would wrap around the underlying surfaces.

Continuing onto your birds, you're certainly thinking through your different forms as they exist with one another in 3D space, so I'm very pleased to see that along with how you're respecting the core principles of the constructional method. There are a couple things you could adjust however to continue to improve your results:

• First and foremost, don't forget to define the joint between sausage segments when constructing your legs with a contour line, as shown in the middle of the sausage method diagram. This goes beyond just the sausage method - really any opportunity to we have to define the relationship between different 3D forms should be taken.

• Secondly, when it comes to constructing heads, it helps a great deal to treat all the different components of the head - the eye socket, the brow ridge, the muzzle/beak, the cheek, etc. to all be treated as different pieces of the same puzzle. In the end, we want them all to interlock with one another. I explain what I mean further here in the informal demos page. While it's an informal demo currently, that is the approach I'll be pushing when my ongoing overhaul of the material reaches lesson 5.

Jumping forward to your squirrels, one thing that stood out a great deal here was the fact that you were not drawing the tails as complete, enclosed 3D forms - opting instead to draw them as flat shapes that would stop as soon as they were overlapped by another structure, and then trying to fix that issue with contour lines. For everything you draw throughout this course, it is critical that all forms drawn in their entirety, so we can fully understand how they relate to the other forms around them. This lesson is of course not about learning anything about drawing animals - it's just using animals as a subject matter, with each drawing being an exercise in spatial reasoning. Can't do that if the things you're drawing exist only as flat shapes on the page.

This also applies a great deal to how you've approached the squirrels' heads, which appear somewhat half-constructed, with you trying to fill in the gaps with visualization without actually drawing it on the page. Ultimately that is what this course is meant to develop - the ability to figure those spatial problems out in your head - but in order to achieve that goal, you must draw each and every step in full on the page. We're training your instincts here, and we do not want to rely on your instincts while we attempt to develop them. That's asking for a mess.

Moving on, I definitely felt that your animal constructions were displaying a pretty good grasp of how they're made up of different solid forms being combined, although I did notice that you were drawing your additional masses with very intentional gaps between them as shown here. I'm not entirely sure why you approached it that way, but in the future, definitely don't. Instead, forcing those masses to actually fit tightly together, and even overlap one another, will help create a more solid, three dimensional structure.

The last point I want to make for now is just to stress the importance of observing your reference not only carefully, but continuously - taking only as long as it takes to put down a specific mark, or draw a specific form, before looking at your reference again. This will ensure that you are not simply drawing from what you remember seeing, which can itself result in a lot of oversimplification. The way you draw your animals does have a fair bit of complexity to it, and the way in which the various components come together does work well to create a believably 3D structure, but I am getting a bit of an impression that you could perhaps push yourself to study your references even more than you are already, and that it would yield a positive result.

Now while I'm overall pleased with the direction you're going, I do want to make sure that you understand what I've explained here - so I'm going to assign just a few additional drawings as revisions below.