Ok a lot to tell here so grab some coffee....
I used to do a lot of behavior work with parrots in NYC,(in home consults, rehabs from abuse, lectures....) so I am no stranger to the subtitles of avian behavior. Eve has me stumped. So I need some advice, as I fear I might be to close to the situation to see what is going on. Eve is about to start his breeding season. (For those of you who are adept at behavior, if you have not read my vasa breeding behavior research please see google link in my sig. I say this as vasa's are different in terms of behavior from of other parrots.)
Now every year some things change and I am used to this and I find it exciting to see what gonna happen every year. Well, last year Eve started head hunting, and I had realized that his protein intake was too low, the need elevates before and during breeding season. And vasa's will naturally hunt for their protein and have a habit of becoming aggressive in captivity if they do not get enough protein. This year I have made certain he has gotten the right amount, so the protein factor in terms of behavior is out as for as explanations go. As the rest of his moods are fine.
Over the past 2-3 years eve has developed the habit of biting the back of peoples necks. Sometimes it is a fly by bite, or while he is taking off from your shoulder. The one thing that I THOUGHT was the trigger for this behavior, the computer screen, is definitely not the main trigger. Eve primarily does this when you are sitting at the computer. And the behavior started when eve used to sit on the back of the chair while my mother was on the computer playing her game. But the game would make scary noises, and it triggered eve to bite her neck or stab her head with the tip of the beak. Which actually hurts more. She then quickly developed a hatred for my mother, and would snatch spoons out of my moms hands when my mother would try to make her tea. Eve would swoop down and snatch the spoon and fly away with it. Poor mom had to struggle to have her tea. lol When I moved back out of my mothers place I figured Eve would be fine, since my mother, (new trigger) was no longer in Eves life. Eve has since transposed this aggressive behavior to my friend who lives with me. Only now it seems to be random. Which I know it can not be, Birds always do what they do for a reason, and it is us that is sometimes unable to pick up on things.
Eve even did a fly by bite on the back of my neck when I walked out of the room yesterday. He flyies and bounces off of your neck and at the same time manages to sneak in a bite. Now this could be a habit gone wild. Or there could be triggers that I am not seeing. This is where I need some help.
Here is what I have observed.....
1 Eve knows it is wrong as He knows he gets a time out for the behavior and tries his hardest to "evade capture" after the bite.
2 the computer is still a major trigger, I think the screen irritates him and he reacts
3 Walking out of the room or walking away from Eve can also provoke this behavior, although this only happens upstairs where is is not entirely comfortable, or in the kitchen. (yes when you are holding a spoon!)
4 This seems to happen to my friend only when I leave the room. Now my friend is more than capable of handling Eve, He is Poe's owner and has lived with Eve for the past 10 years, with the exception of me living back home to recover from my illness. He can also make eve play dead bird on his back, so eve is more than comfortable with my friend.
5 this behavior happens no where else in the house, not in the bird room, or on stands, or the living room, so territorial behavior is out, and vasa's are not territorial by nature.....
6 there is also hormonal component as this also only happens right before and during breeding season. Sometimes but not always it appears as a hormonal surge, in which case Eve has no control over his actions.
7 the ACTION of the behavior does mimic hunting (grab with feet and bite) , although that does not seem to be the behavior expressed given the above observations.
??????????????
this is what I know, and every year it gets to the point that I have to clip eve right before he moults as that is the time when the behavior is the worst. Luckily the clip only lasts for 4 weeks, after which Eve is fine.
I can think of several things going on, like habitual biting that has been transformed into the way he says he is uncomfortable. Eve however is not a biter. Eve never ever bites a soul in any other circumstance but this.
It could be nothing more than a hormonal surge that triggers his hunting instinct. But why then only in certain rooms?
I need ideas as to what is going on other than my own and some ideas on working with this to resolve the issue. I feel I am too close to the situation, to be able see clearly, I am objective but I might not be seeing the triggers correctly.