Bear Sketches and Concepts

I've been working on a various stages of a personal project for the last month and these are some sketches and character designs that I've been working on. The sketches are referenced from the book "Natures Great Events" with the purpose of understanding the shapes and posing of different bears so that I could apply them to my character designs. The bulkier design was my initial concept but I didn't like the design very much and decided to go with the more stream lined concept which will be closer to the final design that I'm still working on.