Fleas, cockroaches, bed bugs and moths can cause problems through out the year where as ants, wasps and flies are generally found in the warmer months.
Fleas are the most common insect found in domestic properties. As a single female flea can lay 5000 eggs during its year long life they are extremely well adapted to cause a quick infestation.
Even properties without pets can have fleas present.
Treatment for these insects can include spraying, dry dust, gels and wasp pots.