Plants emit ultrasonic sounds in rapid bursts when stressed, scientists say

Thirsty or damaged plants produce up to 50 staccato pops in an hour, which nearby creatures may respond to, researchers find

There comes a time in a plant's life when the head sags, the leaves go pale and the body releases a barrage of sounds that are the ultrasonic equivalent of stamping on bubble wrap.

While any gardener is familiar with the wilting and discoloration that comes with drought, a shortage of water or a sudden wound can also prompt plants to produce staccato pops, which nearby creatures may respond to, scientists say.