- Cat fleas are 3mm long wingless ticks, flattened from side to side with long legs enabling them to jump.
- They have both genal and pronotal combs (ctenidia), differentiating them from most other fleas of domestic animals.
- Fleas pass through four stages: eggs, larva, pupa, adult. The eggs are small and white. These stages combined vary from two weeks to eight months.
- The adult flea is awakened by the detection of vibration of pet or human movement, pressure, heat, noise, or carbon dioxide for potential blood meals.
- A cat flea cannot complete its life–cycle feeding only on human blood.
- Cat fleas nest where the host is in its usual resting place, for example the cat basket. This is where the young often drop to mature.