9. Flea
An external parasite feeding on blood of mammals and birds, the flea is usually just about 3 mm (0.12 in) long as an adult, but these small flightless insects can actually jump over a distance of up to 200 times its own body length, which makes it one of the best (if not the very best) jumpers of all animals. Scientists believe the flea can perform this impressive feat thanks to a spring-like structure in its body.
