Specialization is for insects. Understand something - you cannot 'teach' and 'learn' survival. You can only bring enlightenment to the methods that aid in survival.
Survival is a natural reaction known as staying alive.
Surviving can be as simple as running away from a threat or as complicated as living for months on human flesh as seen in the Andean plane crash. In all cases understanding and learning about the surrounding environment as well as yourself are the key ingredients to personal survival. Reading books, watching video tapes and practicing in the wilderness is fine, but the mental edge of knowing 'it's just practice' in a 'controlled' environment is always enough to allow an unfair advantage over a real situation. Although it's impossible to produce a 'real' situation legally and safely, the jungle is about as close as you can get and still remain safe. In the world of survival training, this is bare-knuckled full contact survival compared to the 'padded' settings of most 'survival' schools.