From the Mail Online:
Scientists believe they have made the first ever recording of a tree gasping for water.
Just as humans make a noise as they desperately try to gulp air, living trees make ultrasonic popping noises as they draw in as much moisture as possible to survive during a drought.
The sounds are a hundred times faster than can be heard by the human ear, but a team led by French physicist Philippe Marmottant at Grenoble University believe they have been able to slow the process down sufficiently to be heard during a recent lab experiment.
That gives me an excuse to offer this: