This one was singing a weird song that from a distance sounded like a weird Baird's Sparrow. Up close I could pick up the more typical buzzes at the beginning of the song. It's got a dirty beak like most of the other Savannahs we've seen so far. I guess they root around for food a bit.
Savannah Sparrow, near Brooks, Newell County, Alberta. 25 May 2015.