An investigation of how the impressive jumpers take off finds an answer
No, not rabbits or frogs. Fleas. Using new tools like high-speed video, researchers with the University of Cambridge in England have shown that fleas take off from their tibiae and tarsi — the insect equivalent of feet — and not their trochantera, or knees. The researchers report their conclusion in the March 1 Journal of Experimental Biology.
Regardless of how fleas do it, the insects have always been famous jumpers, says study coauthor Gregory Sutton. “There are even fairy tales that talk about