Mine tries to act like she is a wild green tree python on her branch at times.....you look at her and can just tell by the look on her face...."Yeah, thats right...I am a wild dangerous snake on the prowl...hanging out in the jungle".Its actually hilarious...but we try not to laugh AT her!!
Trying rubbing the neck slowly and then work your way up .....I have one that is NOT head shy at all and another 2 month old that is a big scardey cat of EVERYTHING! But once out for a while.....he calms it down.