What is the fastest animal ever lived?

Modern time fast animals include cheetah at 70mph and Peregrine falcon that reaches its top speed when in a hunting dive 200+ mph or 322 km/hr.

The fastest dinosaurs were probably the ostrich mimic ornithomimids, that ran at least 25 miles per hour from our estimates based on footprints in mud.

Pterosaurs might have been able to fly or glide faster than that.