Hawks have an overlapping field of view of 30-50 degrees for binocular vision, and an overall field of view of about 150 degrees. This allows the bird's brain to work out distance and speed, which is very important for catching prey. This indigestible material is regurgitated sometime after the meal in the form of a pellet. The contents of the pellets may vary at different times of the year, depending upon what prey is available. The feet are very powerful.
Hawks have three toes pointing forward and one pointing backwards.
The inside toe and the hind toe are usually stronger than the others, with larger claws. These toes are used to grip the prey, while the middle and outer toes are used to balance the foot when it is walking or perching. The claws can also be used to kill prey by piercing a weak spot, or by crushing it. Watch carefully as you walk or drive through Fermilab and you may see a Red-tailed hawk perched on a street light, road sign, or tree branch, or soaring gracefully through the air. Sources Baily, Jill.