And this year, their singing heralded a great invasion of army worms.
It took only moments to determine that army worms had taken up residence in our young apple trees, but it wasn't just our trees.
Army worms are a type of caterpillar that defoliates trees and plants, and in a hurry.
When I went out the next morning to survey the kill, I saw exactly what straight vinegar would do to army worms.
The torch came out again, and the army worms were in full retreat.