10/15: acquiring an ear for deer?

We've been living in our current house for a little less than a year. I think we're lucky to be able to see deer now and then--though Chris sees them more often than I do because he's up, about, and outside earlier and more often than I am. But this morning I was stepping out of the front door to put a bag in the trash bin (how glamorous!) when I heard a rustle on my right. I immediately thought, "That sounds like a deer." I turned my head, and there she was, just for a second before she bounded away.