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

Found in dark, protected areas where pets sleep or frequent, such as deep in carpet fibers, bedding, cracks in floorboards, and upholstery.

Diet & Feeding

They feed on organic debris, particularly 'flea dirt' (dried blood excreted by adult fleas), dead skin cells, and other particulate matter found in dust.

Behavior Patterns

Larvae are negatively phototactic (avoid light) and actively burrow deep into carpets or crevices. They molt through three larval stages before pupating in a sticky cocoon.

Risks & Benefits

Risks: They mature into adult fleas that bite humans and animals, causing itching, allergic dermatitis, and potentially transmitting parasites like tapeworms. Benefits: None; they are considered household pests.

Identified on: 2/15/2026