Flea Larva

Scientific Name: Ctenocephalides felis (most common) or Ctenocephalides canis

Order & Family: Order: Siphonaptera, Family: Pulicidae

Size: 2 to 5 mm in length

Flea Larva

Natural Habitat

Dark, humid areas indoors such as carpet fibers, pet bedding, floor cracks, and upholstery where organic debris accumulates.

Diet & Feeding

Scavengers that feed on organic matter, primarily dried blood (flea dirt) excreted by adult fleas, dead skin cells, and other debris.

Behavior Patterns

Flea larvae avoid light (negatively phototactic) and burrow deep into carpets or bedding. They are active movers but do not jump like adults. They eventually spin a cocoon to pupate.

Risks & Benefits

Risks: They mature into biting adult fleas that cause itching, allergic dermatitis, and can transmit tapeworms and diseases like typhus to pets and humans. Benefits: None in a domestic setting; they are significant pests.

Identified on: 2/7/2026