Which is the fastest animal on earth taking size into account?
The fastest animal taking size into account is tiger beetle. It can run at a speed of 8 kmph that is very fast for an insect. Means 171 times its body length. It can complete 100 metres in 0.83 seconds if of human sized. A cheetah has to run at a speed of 770 mph to be no.1. Cockroach also runs very fast completing 100 metres in 1.44 seconds if human sized. House mice have an adult body length (nose to base of tail) of 7.5–10 cm (3.0–3.9 in) and speed of 8 miles per hour. Cheetah’s total body length is from 115 to 135 cm (45 to 53 in) and speed of 75 miles per hour.
