A wide variety of animals, including humans.
Flea eggs are small and white.
Generally, after several weeks the eggs drop off and hatch into tiny, hairy, worm-like larvae. The larvae are usually found where the animal sleeps, along baseboards, in carpets, or on furniture. Pupa mature to adulthood within a cocoon woven by the larva to which dust, pet hair, carpet fibers, and other debris adhere. After about five to fourteen days adult fleas emerge from the cocoon. Female fleas lay up to twenty eggs per day and six-hundred in a lifetime.