The fastest speed is more than 350 kilometers per hour! The world's fastest bird-tip-tailed swift, faster than high-speed rail! The fastest speed is more than 350 kilometers per hour! The world's fastest bird-tip-tailed swift, faster than high-speed rail! The fastest speed is more than 350 kilometers per hour! The world's fastest bird-tip-tailed swift, faster than high-speed rail! The fastest speed is more than 350 kilometers per hour! The world's fastest bird-tip-tailed swift, faster than high-speed rail! The fastest speed is more than 350 kilometers per hour! The world's fastest bird-tip-tailed swift, faster than high-speed rail!