Flea larvae are typically found in.

• A. On the host's body
• B. Rodent nests, pet resting area
• C. In running water
• D. In human houses' walls

Answer: (B)

Flea larvae are the free-living, environmental stage of the flea life cycle. After adults feed on a host, eggs drop into the environment and hatch into larvae that feed on organic debris, including flea dirt and other matter. They prefer dark, protected, damp spots with plenty of organic material to feed on, which is exactly what rodent nests and pet resting areas provide. These locations stay warm and humid, and they accumulate debris that larvae can feed on, making them ideal habitats for development.

That’s why rodent nests and pet resting areas are the typical sites for flea larvae. They aren’t usually found on the host’s body, since larvae stay in the environment rather than attached to the animal. They aren’t adapted to running water, and although some larvae can be in hidden spots inside a house, the most common environments are nests and resting areas where organic debris concentrates.