I have found two answers.
1. horizontal speed of about 55mph, stoop speed of up to 270 mph
www.extremescience.com/fastinworld.htm
2. stoop speed of up to 242mph
wolf21m.blogspot.com/2008/01/peregrine-falcon-speed.html
The peregrine falcon can dive at more than 200 miles per hour
Peregrine Falcon
200 miles per hour
The fastest recorded speed of a Peregrine falcon is 389 kilometres per hour, which is equal to 242 miles per hour. This is not its cruising speed, but its diving speed, which is when it makes maximum use of its long wingspan, streamlined shape and powerful chest muscles.
Your peregrine thoughts have illumined my mind.The Peregrine Falcon (Falco peregrinus) is also known as the Duck Hawk, in America.The peregrine may reach a speed of 200 miles per hour, in a dive.
When diving to capture prey, the peregrine falcon can exceed speeds of 200 miles per hour (322 kilometres per hour).
200 miles per hour
The highest velocity of a bird is approximately 200 miles per hour. This speed is reached by the peregrine falcon when it dives for hunting purposes.
The top speed man has run is about 25 miles per hour; the fastest dog, the greyhound, reaches a speed of 40 miles per hour; racehorses have been timed at 50 miles per hour; and antelopes can go close to 60 miles per hour. But none of them can come close to the world's fastest runner, the cheetah. No animal on earth can outrun the cheetah's 70-mile per hour speed.
It is the peregrine falcon, reaching 322 kilometers per hour.
The slowest animal is the sloth. Their top speed is 0.003 miles per hour. The fastest animal is the cheetah or the peregrine falcon (there is an ongoing debate about which one is faster). Cheetahs' top speed is 75 mph. Peregrine falcons' top speed is 60-100 mph. On land, the cheetah is the fastest. In the air, the peregrine falcon is the fastest. Hope that helped =)
It depends on what you are asking. If you are asking for verticle flying the Spine Tailed Swift is fastest. This bird can reach 171 kilometers per hour (106 miles per hour) the peregrine falcon can only reach 89 kilometers per hour (55 miles per hour). When comparing diving speeds the Peregrine Falcon is the fastest. The Peregrine Falcons famous "power dive" lets it reach speeds of 370-440 kilometers per hour (231-240 miles per hour). i hope i helped.