Yes. If you did not kill the hawk yourself and obtained the items from a dead hawk or bought them from someone who obtained them that way, it is legal.
Most hawks are very territorial so playing is not really common as far as I know. There are several species that will do "sky dancing" as they fly at each other in a mating ritual. I have seen a...
A male Red-tailed Hawk may weigh from 690 to 1300 grams (1.5 to 2.9 pounds) and measure 45-56 cm (18 to 22 in), while a female can weigh between 900 and 2000 grams (2 and 4.4 pounds) and measure...