I have 2.1 johnii.
My female will attack anything that comes near her cage and usually starts lunging wildly whenever her cage is opened. Sometimes she does it when I enter the room. Of course, it is simply a wild feeding response, not defensive. I had a baby that bit quite a bit a few years back.
My two males are very different. My brown male is a puppy. My sunset male is a little less trustworthy. Of course, this might be because I rarely if ever handle them. I'm afraid to handle her because I think she would eat my arm. :lol:

Maybe those sunset line snakes are just mean? 
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Chris Harrison
San Antonio, Texas

