How to draw humans

http://www.illustration-tutorials.com/

How to Draw Animals - esp. cows

HowStuffWorks "How to Draw a Cow"
Artprojectsforkids.org-How to Draw a Cow

Figure drawing: Basic Pose and Construction

Figure drawing: Basic Pose and Construction
By William Li
Some great tips how to make drawings of people and creatures look realistic.

http://www.elfwood.com/farp/figure/williamlibodyconstruction.html

How to draw a Lion video

http://www.drawingnow.com/how-to-draw-a-lion.html