Pictures of Flea Larvae

picture of a flea larva on white background

Peter J. Bryant

Img 1 Picture of a cat flea larva (Ctenocephalides felis) on a light-colored background.

picture of a cat flea larva under microscope with red blood in its digestive track

Kalumet

Img 2 Microscope image of a cat flea larva (baby flea) with visible red blood in its digestive track.

illustration of flea larva

FleaScience

Img 3 Illustration of a cat flea larva compared to the size of a sharp #2 pencil tip (1 mm).

picture of shed flea larval casings

Auguste Le Roux

Img 4 Picture of shed larval casings from previous moults, along with an egg and feces from adults.

picture of white prepupae larvae of the cat flea

Auguste Le Roux

Img 5 Picture of 3rd instar cat flea larva in the prepupa stage after voiding its gut.

animated gif of flea larvae living in carpet fibers

Fleas — Michael Dryden, DVM, MS, PhD

Img 6 Flea larvae living within carpet fibers, the most common place to find larvae in homes.

picture of baby flea hatching from egg

Cat Flea Biology

Img 7 Cat flea larva hatching from its egg with an egg burster spine located on its head.

picture of flea larva ctenocephalides felis eating flea dirt

Cat Flea Biology

Img 8 Cat flea larvae feeding on a spherule of adult fecal blood (“flea dirt”).

picture of cat flea larvae forming a cocoon

Cat Flea Biology

Img 9 A cat flea larva creating a silken cocoon. The mandibles are used to form the structure while silk is excreted from labial (salivary) glands.

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Discussion

  • Hey carolina October 2, 2017, 7:49 pm

    We are having trouble with fleas. We’ve fumigated,, fogged, and an exterminater has come 3 times we have vacuumed and still vacuuming. Oh and my husband the dust you put on the grass. We took every toy out side and have put bedding in bags. We have no pets so we don’t understand why there still here.It started right after my breast surgery on June 29. My husband would ask if any thing was biting me and of course I was still under medications so didnot feel them after 5 weeks is when they started biting me too. We bag our dirty clothes and put our clean clothes in bags right after washing. We’re at our woods end and they seem to stay alive in the bag to it seems nothing I do works. Were dead tired I sleep wrap like a cocoon and they won’t go away. What are we doing wrong

    • Adam Retzer October 3, 2017, 10:37 am

      If you don’t pets, then I’d guess you’re dealing with human fleas (P. irritans). This species is somewhat rare and not the focus of this site. Regardless, control for human fleas is the same as other species.

      It sounds like you’ve taken all the correct steps. Applying an insect growth regulator (IGR) to the environment, and vacuuming regularly should eliminate the infestation in about 8 weeks. Our page on How to get rid of fleas has comprehensive control information for more details.

      I’m not sure why the control procedures aren’t working. Your situation seems odd. I think an in-person evaluation would be needed to tell what’s going on. Perhaps consider hiring a different pest control specialist? Are you positive you are dealing with fleas, and not another pest like bed bugs? Fleas don’t stay on people or infest clothing, so it’s strange that you are finding them in the bags with your clothes.

      I’m sorry I can’t offer more assistance. Unusual cases such as yours often require taking a look in person, which a pest control specialist can do.

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