Flea Pupa / Cocoon
Scientific Name: Ctenocephalides spp.
Order & Family: Order: Siphonaptera, Family: Pulicidae
Size: The cocoon is typically 4-5 mm in length. It is often camouflaged with debris from its surroundings, such as dust, hair, and carpet fibers.
Natural Habitat
The pupal stage is found off the host, typically in protected areas like carpet fibers, under furniture, in pet bedding, and in cracks in the floor where the host animal rests or sleeps.
Diet & Feeding
The pupa itself does not feed. The larval stage that precedes it feeds on organic debris, primarily the feces of adult fleas ('flea dirt'), which consists of dried blood.
Behavior Patterns
This is the pupal stage in the flea's life cycle (egg, larva, pupa, adult). The larva spins a sticky, silken cocoon, pupating within it. This stage is highly resilient and can remain dormant for weeks or months. The adult flea emerges from the cocoon when stimulated by vibrations, heat, or carbon dioxide, indicating a potential host is nearby.
Risks & Benefits
Risks: The presence of pupae indicates a flea infestation, which can be difficult to eradicate as this stage is resistant to many insecticides. Adult fleas are parasitic pests that bite pets and humans, causing irritation, allergic reactions (flea allergy dermatitis), and transmitting diseases (e.g., murine typhus, bartonellosis) and parasites like tapeworms. Benefits: There are no benefits associated with fleas in a domestic environment.
Identified on: 11/16/2025