What is flea pupae?

By Dr Zoe Costigan

January 8, 2026
1 MIN READ

Flea pupae are the transitional, inactive stage in the flea life cycle that occurs after the larval stage and before the adult flea emerges. When a flea larvae has fully grown, it spins a protective silk-like cocoon, often incorporating dust, hair, and debris from the environment. Inside this cocoon, the flea transforms into a pupae where its body reorganises from the worm-like larvae into the fully formed adult flea.

Click here to see the full flea life cycle!

Here is an image of flea pupae and an adult flea:

Pupae are typically hidden in warm, protected areas such as carpets, cracks in floors, pet bedding, furniture, or soil. The cocoon is sticky and camouflaged, helping it resist physical disturbances, cleaning, and some insecticides. This means in order to kill fleas at this life stage, you must heat up your home and use vacuum your home daily to hatch the eggs. Then you can use an effective household flea spray, like the Itch Flea House Spray to kill the new adult fleas in your home.

Frustratingly, flea pupae can remain dormant for days, weeks, or even months if the conditions aren't right to breed in, such as no pet to feed off or a cold, dry home. But this means fleas can reside in your house for so much longer than you realise.

Find out more about dormant fleas here.

To effectively kill all fleas your home, you need to treat both your pet and your environment. Get Rid of Fleas with the Itch Flea Eradication Kit which targets all flea life stages with every treatment you need to ensure fleas never come back.

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What is flea pupae?