Unfortunately, there are also less welcome visitors in the shape of moths and fruit flies.
European Union rules restricting insecticides have encouraged the former. Perhaps they all wear plastic suits in Brussels or perhaps the EU gravy train runs so deep that its officials can afford to buy a new suit each week. The fruit flies are encouraged by, well, er ... fruit.
There are a number of ways of combating them - the best is to leave a small bowl full of rather overripe berries on the kitchen table, almost but not entirely covered by plastic wrap. The flies get in there after the fruit but, like lobsters in a lobster pot, are less good at getting out.
Apply the thumbs to the plastic wrap and they can be squished into the berries at will. That reduces the number of fruit flies and also allows you to satisfy any murderous tendencies you may have without damaging your fellow human beings.
I came down to breakfast a couple of days ago and started scavenging in the fridge. There wasn't much there apart from yogurt and I looked around for something to eat with it. My eye fell on a bowl of fruit on the bench and, fruit flies being small, I didn't realise why it had been left there. On with the yoghurt and a sweet but slightly crunchy breakfast cereal had been created. Delicious!
Later, I discovered my mistake and was slightly taken aback. As far as I am aware, none of the great chefs list fruit flies as an ingredient in his or her dishes but, then again, why not?
They have a high level of protein and, if they are nature's scavengers, so too are shrimps and prawns. The only real difference is that one generally eats fruit flies uncooked.
The papers are full of articles about the low quality of the diet consumed by English schoolchildren - too much bread and not enough protein, they say. Well, I am going to write to the Education Secretary to tell him how to fix that one - and, if the exam results improve due to better nourishment, I will ask him for a fee.
Before retiring, John Watson was a partner in an international law firm. He now writes from Islington, London.