Adult fleas are wingless and cannot fly, they are very capable jumpers and use this as the means of movement on to a host as it passes by.
Larvae are also mobile, however they crawl slowly from one location to the next, most frequently to locate food and the protection provided by a shady and moist location favourable for larvae survival.
A Federal Pest Control Flea Treatment works to kill fleas at all stages of the lifecycle not just adult fleas. In order to understand how this works its good to have an idea about how fleas actually reproduce.
Read Next: Reproduction and Life Cycle