hi,

i want to know if and or why does a gobblers head change

Not really sure. Thats a good ?

the best i can guess is the mood they are in.....

..My guess...some type of chemical reaction in the blood...but i think they are true
americans......RED,WHITE,AND BLUE...

It changes in response to the ammount of blood flowing at the surface of the skin and whether or not it is oxygenated. If blood is rich in oxygen, it is bright red. If it does not have oxygen (on the way to lung to exhale and reload it with oxygen on the inhale) it is a sort of blueish purple. The skin is naturally very pale and appears white, otherwise.

He apparently changes his head color at will, in a colorful display to attract the hens. Its part of the display, like his fan and strut.

I've seen a Tom with a really bright head and then I saw 2 bigger Toms come chasing him and his head instanty changed grey. It was wierd.