Yes. That is how they move around and it is the muscles you are eating when you eat chicken
Yes they do.
migratory birds have strong wing muscles as they have to fly long long distances and it requires a lot of power to fly very far.
The breast muscles are not the most powerful in all birds - only in birds capable of flight. This is because it is the breast muscles that power the wings.
Birds fly in the air by pushing their chest muscles and moving their wings up and down.
thin bones, muscles and feathers
The most important flight muscles are the pectorals, which correspond to the muscles of your chest :)
its the sternum.
Among other adaptations, birds have hollow bones to make for a very light skeleton, a large breastbone to attach flight muscles, and strong muscles in their chests for flight.
Hollow, light bones. Big chest muscles.
Yes, it consists of the supracoracoideus and the pectoralis.
Birds flap their wings in place to maintain balance, regulate body temperature, and strengthen their flight muscles.
Not if the birds are young. The older birds have grown using muscles heavily and will be less tender but the flavor will be the same.