The beautiful and dangerous peregrine falcon is the fastest bird in the sky, boasting a speed of up to 220 mph on its attack dives and flying incredible speeds during regular flights and in aerial pursuit of prey. Nesting on the side of cliffs and high points they overlook their territory and protect it hardily. The main diet of these speed demons is mostly other birds of smaller varieties which they strike and kill in mid air and then return to their nest or perch area to eat. Male and female may mate for life and both participate in raising their young. Though they are found on six continents they are uncommon in most areas but are being found more and more in cities where the taller buildings resemble their cliffside perches and homes.