The female flea can consume 15 times her own body weight in blood every single day, but when food is scarce, a flea can live for more than 100 days without feeding. Coupled with the fact that a female flea can lay 2,000 eggs in her lifetime, these insects can be very hard to exterminate.
A flea can jump 350 times is own body length. That’s equivalent to you jumping the length of a football field. This makes them hard to catch.
Although considered a nuisance, fleas are essential to the health of some animals like armadillos and hedgehogs; they provide necessary stimulation of the skin. Deloused armadillos and hedgehogs can die.