This section is from the book "The Balance Of Nature And Modern Conditions Of Cultivation", by George Abbey. Also available from Amazon: The Balance Of Nature And Modern Conditions Of Cultivation.
Feeding upon aphides, caterpillars and other forest, field and garden pests, much benefit is conferred on the nation. Similar remarks apply to the Lesser Whitethroat or Brake Warbler. In Fruit Crops and Bird Protection Mr. Cecil H. Hooper says, of the nettle creeper, that " in July and August they bring their broods into gardens and orchards, and make havoc among the currants and raspberries: they also eat green peas and peck green gooseberries." This excerpt is given as showing the acquiring of new tastes by insectivorous birds under certain circumstances, for in ordinary garden practice these proclivities on the part of the whitethroats are certainly exceptional, and, for practical purposes, it is safe to say that the benefit derived from their presence more than counterbalances any loss of garden produce.