Katydids have numerous calls of different lengths, and robotics researchers have even used the insects to send messages into the environment.
Hornets are not aggressive unless provoked, but they are big and have dangerous stings. They also love honey and cause trouble for bees.
These DIY methods can keep all unwanted bugs away from your living areas without harsh chemicals or be a supplement to professional pest control services.
A new study finds which types of milkweed most benefit these pollinators as well as the best places in the garden to plant them.