Drawing Birds with John Muir Laws

I've been using Apologia's Flying Creatures of the Fifth Day, and enjoying it very much.  This week we added some bird drawing lessons and I was impressed with the results.  The book we used is The Laws Guide to Drawing Birds.  This book is packed full of wonderful information, diagrams and assignments.  I think it could be used for a whole year of art and science lessons just in itself.  I highly recommend it. We have used some of John Muir Laws You-tube videos on drawing from nature and found them helpful.  This week we did a two-page demonstration--assignment with 18 steps to drawing a warbler from this book.  The book has comprehensive information on bird anatomy along with detailed art lessons specifically geared for drawing birds.