Listen to the Thirsty Trees

Did you know trees make noise when they get thirsty? Bioacoustician Bernie Krause has amplified and recorded these sounds, which are generally inaudible to human ears. You can read and listen here. Even more interesting is his work dealing with biophony and the idea that each component in an ecosystem makes sound within its own particular pitch range.

There is an informative video about French research into the subject of vascular tree noise here.