They differ from hawks by being more streamline, with long narrow wings. They are proficient, fast hunters. Female peregrines are larger than males. Scientists believe one reason for this is that it enables the birds to hunt different sized prey. This way the male and female of the pair are not competing with each other for food.
Peregrines do all their hunting in the air.
Peregrines are naturally cliff dwelling birds and their nests can be found on the ledges amongst these tall cliffs. The usual clutch size is 4 eggs with the incubation period lasting a month. Once the chicks hatch, the female will brood the chicks until they are big enough to handle the weather on their own. This usually lasts around a week. In the mean time, the tiercel will do the hunting for the whole family.