May Walk - soundscapes

For our May walk (Sunday, may 15) I want to propose a theme of "soundscapes". Our April walk found a much friendlier forest (for me) because it was filled with the voices of birds. I would like to take a walk where we spend our time listening, taking note of the sounds of the Preserve, taking note of where and when we hear various things. Here is a quote from a recent article on conserving sound:" we need a nuanced sense of the terrain - the park hidden inside the park - land conservation must include the conservation of soundscapes." At the CREA Preserve the soundscape is constantly changing - so I would like to try and start making record of that, to concentrate on hearing for a little while, rather than seeing.
John Muir said that he could identify every tree species in the Sierra Nevada by listening to its "wind-music". What do you hear?
Some things we have already talked about - the road sounds, the river sounds, the bird song, the frogs, echoes, the music of trees (dry leaf rattle, wind in needles, branch against branch...) squirrel, chipmunk, water tributaries flowing, ice sounds, wind on water, footsteps, thunder, your own breath and heart, voices in the distance, that dragonfly whizzing by... What do you hear?
Here's a little poem by Wang Wei:

Empty mountains:
no one to be seen.
Yet - hear-
human sounds and echoes.
Returning sunlight
enters the dark woods;
Again shining
on green moss, above.

(Wang Wei)

What do you hear?

Gary Lawless