Eggs will usually hatch in days, depending on the temperature and humidity of the environment they fell into. Many flea problems are caused by the cat flea, Ctenocephalides felis. On closer examination you could find adult fleas in the coat or at the base of the fur on the skin. Cambridge University Press, Amphibians Frog Salamander Toad Toadstone.
Unlike other insects, fleas do not possess compound eyes but instead only have simple eyespots with a single biconvex lens; some species lack eyes altogether. The eggs take around two days to two weeks to hatch. Buildings sometimes become infested with fleas even when there are no pets around. The tough body is able to withstand great pressure, likely an adaptation to survive attempts to eliminate them by scratching. A thermal heat treatment is then used to completely eliminate any bed bugs without the use of chemicals. Not all products are registered for use in young puppies and kittens and may be quite dangerous. During pupation, the aspiring adult spins a silk cocoon, where it matures within a week or two.