What types of insects buzz?

Insects that buzz primarily include bees, wasps, and some species of flies, such as hoverflies and certain types of mosquitoes. These insects produce their buzzing sound by rapidly vibrating their wings, which serves various purposes, such as attracting mates, establishing territory, or warning off predators. Additionally, some beetles, like the "buzzing" click beetles, can also generate buzzing sounds as part of their defense mechanism. Overall, buzzing is a common characteristic among many flying insects.