National History Museum Sketches

I've made it a habit to go to the National History Museum and to draw for a couple of hours every week. Here are my drawings so far:

Blue Zone - Martine area:

Green Zone - Minerals section:

The fish looks like its half bird, half fish :)

A drawing of a chicken! Sorry, it's very hard to see. I really like this drawing but I couldn't finish toning it. I'm sure I'll finish it in the future.

This is my first attempt to draw any sort of bones. Its not easy! I think I need more practice.