Mostly what you hear in this track is wind. Occasionally some rocks or pebbles will skitter along a hard surface. There's also quite a bit of chittering from some kind of animal—bats, perhaps, judging by the occasional flapping of wings. The overall effect is … well, not one of Wes Otis's better efforts. The chittering gets annoying pretty quickly, and the rest is primarily white noise. It seems to do what the composer/engineer intended, but the overall effect is just bland in my judgment.