What is the fastest animal?

  The fastest insect is probably the botfly which darts along at forty or fifty miles an hour.
  Dolphins are fast swimmers. They can keep up with motor boats traveling thirty miles an hour.
  The cheetah, most people agree, can go faster than any other four-legged animal. Its record is about seventy-five miles an hour. Hunters have trained cheetahs to pursue and kill swift-running antelopes and deer. And when there's nothing to hunt, a trained cheetah will race an automobile just for fun.
  Many naturalists think that the peregrine falcon (or duck hawk in North America) is the fastest bird. The Peregrine is renowned for its speed, reaching over 210 mph (325 km/h) during its characteristic hunting stoop, making it the fastest member of the animal kingdom.