Yesterday I thought I heard the bird song that sounds like "O Sweet Canada Canada Canada" in the distance from our back door. Today, I saw a white-throated sparrow (whose song this is) in our backyard feeding on the ground. Very pleasing! I see white-throated sparrows about once a year too, just like brown-headed cowbirds. Unlike the cowbirds that do stay here all summer (just not in our backyard), I think the white-throated sparrows are just migrating through. I'm glad that they migrate through our yard, and I hope they continue to do so!
Here's a hazy picture of the sparrow (along with some other bird in the background that I was unable to identify) that I caught through our kitchen window: