At least 200,000 species sing in ways that are silent to humans. Listen to one of them now
Some creatures are so quiet, they appear to make no sound at all. When a male treehopper calls out for a mate, he shakes his abdomen 100 times a second to produce a low sound that vibrates through the stem of the plant he is standing on. While that sound is audible to other treehoppers … Read more
