A great place to listen to insects — and birds — is a remote mountain lake in the spring. The surrounding mountians and properties of the cold water make these lakes some of nature's great concert halls.  Gordon Hempton, an acoustic ecologist and sonic guide for the this series, recorded the sounds of this lake in Washington’s Methow Valley. The air is so clear of noise you’ll actually be able to hear the tiny splashes of lake trout gobbling up insects from just below the surface. Now let's sit back, relax, and listen the natural concert.