Because he spoke to the fish in the creek
He tried to tell us that the animals could speak
And who knows? Perhaps they do
How do you know they don't just because they've never spoken to you?
- from Michael Martin Murphy's "Boy From the Country"
Yes, animals communicate. They communicate with each other, with people and have even built a pretty good rapport with Mother Nature.
Many of us can understand what animals are saying by interpreting audible cues like a whimper or a purr. Anyone who has been to a dog park knows that a bow means, "I want to play!" while snarling teeth say, "Back off!" Some of us communicate with our animals on a daily basis when we recognize patterns in behavior like scratching at the door, or aloof cats that come running at the sound of a can opening.
Not satisfied with non-verbal communication, a Japanese company recently developed a "Bow-Lingual" device that utilizes a wireless micrphone attached to your dog's collar to translate every yip, whine and bark, letting you know if your pet is happy, sad, frustrated or needy.