Fleas are a significant problem in Sydney, particularly in spring, summer and autumn. Due to the life cycle of the common flea, pets need to be treated year round to prevent infestation.
The adult fleas you see on your pet represent only 10% of the entire flea population in your environment. The remaining 90% of the population exist as flea eggs, larvae and pupae which you are unlikely to see. Fleas breed very rapidly in summer, completing the life cycle in less than 21 days; therefore a small number of fleas can become many thousands very quickly. Flea pupae can survive for up to a year in your home environment and are very difficult to kill.
Fleas breed all year round in Sydney but prefer heat, humidity and vibration. This explains the sudden “hatching” of fleas as the weather starts to warm up.