Well you do have a valid point pikey about the aggressiveness.
and yes being outside definetly doesnt help as they pick up on different scents and sounds.
I mean all I can really say is to build a bench for them, if your afraid of putting your hands in the cage then build a bench that connects to the front of the cage when the door is open.
by doing this you accomplish 2 things, bringing the tegu to the food and allowing the tegu to interact with the "outside" world he will automatically shut off his "home defense insticts" and should calm down, if hes still lunging i'd say you have your hands full but with enough patience and persistance any tegu will eventually realize your not there to hurt them.
and yes being outside definetly doesnt help as they pick up on different scents and sounds.
I mean all I can really say is to build a bench for them, if your afraid of putting your hands in the cage then build a bench that connects to the front of the cage when the door is open.
by doing this you accomplish 2 things, bringing the tegu to the food and allowing the tegu to interact with the "outside" world he will automatically shut off his "home defense insticts" and should calm down, if hes still lunging i'd say you have your hands full but with enough patience and persistance any tegu will eventually realize your not there to hurt them.