Although cicadas can be unnerving and outright spooky in big numbers, they’re not harmful at all. Even if they wanted to bite or sting, they don’t have the body parts for it. They don’t destroy crops like locusts, and they aren’t poisonous or toxic (although your pets wouldn’t be able to digest them). All in all, cicadas aren’t really dangerous, although they can damage some plants. In This Article Cicadas are not locusts — and not dangerous to plantsEvery few years, parts of the United States become the stage for one of nature’s most spectacular and noisy events — the emergence of cicada broo…