Jim,
I really enjoyed the article on tracking by James K. Actually, I have enjoyed all of the articles in Survival Blog.
I try to test my tracking skill whenever I get the change and have been doing it for almost 60 years now. Besides the ones mentioned in the article another guide that I have found to be valuable is: Mammal Tracks & Sign: A Guide to North American Species, by Mark Elbroch. It was published by Stackpole Books in 2003. Unfortunately it was printed in China but of very high quality. (I prefer U. S. made products when I can get them.)
I sure wish that I had a book like this when I started tracking in the early 1950s.
Incidentally, I used my hard-earned tracking skills to great effect in Southeast Asia in the 1960s as a member of the Big Green Machine.
Thanks for a great Blog. From the end of the gravel road in very rural North Dakota, – Bob P.