The flea life cycle
The fleas go through four different life stages of egg, larva, pupa, and adult. The eggs, larvae, and pupae you will find in cracks and crevices or carpets in the rooms the pet normally frequents. At pupation the flea larva will produce a silk-like sticky cocoon. The cocoon will protect the developing flea (pupa) for a prolonged period under unfavourable conditions and is very resistant to chemical and mechanical treament. When triggered by changes in temperatures and carbondioxide the flea will leave the cocoon and guided by changes in light it will seek out a host, normally a dog or a cat, where it will stay for the rest of its life.
The development period from an egg to the adult flea depends primarily on the temperature and may be completed in as little as 14 days at 90°F/32°C or be prolonged up to 140 days at 55°F/13°C. On its host, the female flea is capable of producing more than 25 eggs a day. The eggs are not sticky, and they will fall off your dog or cat together with the flea feces.
Adult fleas feed on blood, which they are sucking from their host. The larvae, however, feed on organic debris such as dried flea feces which contains residues from the digested blood meal of adult fleas.
How can I tell if my pet has fleas? – click here.