The orthopteran symphony is nearing its crescendo right now. Various crickets, trigs, coneheads, and katydids are chirping, rasping, scraping, trilling, and making all of the other sounds that they do. In spite of the absolutely dominant wall of sound that these "singing" insects create, especially at night, how many of them do you actually see?
HERE, and see if that's a sound you've heard before.
But when they are resting on vegetation, it isn't hard to see why we hear far more of these leaflike singers than we ever see.