Just a point of clarification. When Peregrine stoop on their pray they are more likely to use their chest to impact the soon to be meal. They have been observed balling their talons like fists to strike pray in a dive but generally the are not going at top speed as such a impact would likely to break the small bones in their legs and feet, where as their keel (breast) is reinforced to take the impact. Peregrines are more likely to use their feet to grapple onto pray to control their descent. In the case of prey they have simply stunned, or knocked unconscious they use a notch in their beak (called a Tomeal Tooth) to break the neck of their pray. Very useful for avoiding a battle with a stronger, larger bird. Love your post... I just couldn't resist the urge to bird nerd out a bit. A true Peregrine exotic should be a chest piece with a jet pack. If you don't kill your targets out right from the impact they should be stunned so you can then break their necks before feasting on the blood soaked glory of your victory over less evolved prey. Sincerely, A Falconer.