Check out the fastest bird on earth!
The peregrine is the fastest bird on record reaching horizontal cruising speeds of 65-90 kph ( 40-55 mph) and not exceeding speeds of 105-110 kph (65-68 mph). But when they dive, they can reach up to 200 mph!
Watch this amazing video that shows a sky-diving scientist and a peregrine named Frightful. He releases a lead-weighted lure and sky-dives after her while they measure her speed.