I read this article about new research on plant behavior that included the following paragraph:
Just because we humans can’t hear them doesn’t mean plants don’t howl. Some of the compounds that plants generate in response to insect mastication — their feedback, you might say — are volatile chemicals that serve as cries for help. Such airborne alarm calls have been shown to attract both large predatory insects like dragon flies, which delight in caterpillar meat, and tiny parasitic insects, which can infect a caterpillar and destroy it from within.
The idea that plants possess a certain awareness or at least a tactile sense perception is rather startling. Imagine walking through the woods among the trees who are dimly aware of you. We are used to thinking of trees as almost inanimate objects, pushing forth from the dirt in a blind process of life. But, if they can respond to attack and can signal one another then it brings them closer to possessing a certain being.