(AP) — The most noticeable part of the cicada invasion blanketing the central United States is the sound — an eerie ... down,” Jennifer Rydzewski, an insect ecologist at DuPage County ...

The sounds vary widely, and some species are more musical than others. Though cicada noises may sound alike to humans, the insects use different calls to express alarm or attract mates.

He expects that this spring’s unusual emergence of two enormous broods of cicadas will heighten interest in insects in general and the Insectarium. Voice 2: Periodical cicadas stay buried for ...