Shrill insects
Else clues• Droning insects
• Flying noisemakers
• Insects in swarms
• Large droning bugs
• Late summer whiners
• Noisy insects
• Noisy summer insects
• Periodical pests
• Seventeen-year locusts, e.g.
• Summer buzzers
• Summer droners
• Summer noisemakers
• They have a 17-year cycle