My female turkeys were bought at about 5 weeks old, and have enjoyed being outside since the day they arrived. They are locked in at night of course. We have had Homer for a year now and he is grand. His original Marge was taken by the fox in the spring, so I have now bought him a new Marge and a Betty, and even though they are young, he displays for them all day long.
The males heads are totally different from the females. They get all warty and develop a long gobbler as I call it, around their neck. They also have a lump in the middle of their forehead which develops like a huge worm. All this on and around their head is all there for displaying to their women.The lumpy thing on the forehead extends and contracts - it hangs at a lenth of about 3 inches when he is full display and dangles at the side of his beak.
The gobbler bit under the chin also hangs low and changes colour when he displays and then contracts again when he has finished.
The females have sqrawny little heads which look very small in comparison to the size of their body.
Not a technical explanation but I hope it helps.
Kate