Mystery solved.

While in Grande Prairie, we heard this bird that sang "Three Blind Mice" all day long. We never saw what it looked like, and everyone we asked didn't seem to know what we were talking about. The girls wished that Grandma and Grandpa were there with their bird book to help us figure it out. We googled "bird that sings three blind mice" and finally figured it out. The bird is a Golden Crowned Sparrow.