Armatures for polymer clay creatures.

I'm new to armatures for polymer clay, and so I'm going to list resources that help me.  I've been using steel wire covered with crumpled aluminum foil to help bulk out the form, and therefore use less polymer clay. But I want more tips on making anatomically correct armatures for animals.

http://www.squidoo.com/armatures 
http://joshuamosley.com/tutorials/claymationArmature/armature.html 
http://evasion.imag.fr/Membres/Franck.Hetroy/Projects/Skeleton/gallery.html

 Here's the concept of one of my creatures, and the final little dude. My sister bought a smaller similar creature for $20. I dyed the feathers too.