All fleas live as parasites on warm blooded animals, including humans. Larval stages nest in the host & feed on skin, feathers & the blood-rich faeces of the adult flea. The larvae once fully grown spin camouflaged silken cocoons. Once fully developed, the adult waits until it feels the vibrations caused by a potential host & only then does it come into view. Adult fleas feed on blood their bites may cause deep irritation around a central bright red spot. People can react differently to a bite in relation to the severity of reaction & the time taken to react. September tends to be the peak month for flea infestations. Wall to wall carpeting provides a quiet & undisturbed environment for the flea larvae to develop, whilst central heating ensures ideal temperature conditions.