Do you ever walk with your ears?

Today, instead of the usual bike ride, I went for a walk. I had my music  and ear buds in hand but as I stepped out of the house, the birds were singing. And I wondered just how many different and interesting sounds will I hear on this in the cool of the day walk?

The answer, a multitude. Birds, insects, tires, people, air conditioners, fans, electric transformers, frogs, squirrels. It was amazing.