Four or five Scouts enter the stage (more can be accommodated) and stand facing the audience. The announcer explains to the audience, "If you listen quietly you can hear the sounds of the wilderness: the birds" (one Scout whistles a bird song, then stops).
The announcer continues: "… or the deer" (another Scout makes swishing sounds like a deer traveling through the brush, then stops).
The announcer continues: "… or the bear" (another Scout growls).
And so on, for as many Scouts as you have on stage.
Finally, the announcer says, "And if you are very, very quiet, you can hear the sound of the lost Boy Scout…"
From offstage, you hear, "HEY! WHERE ARE YOU GUYS?"