Grasshopper Sparrow, Ammodramus savannarum
The Grasshopper Sparrow gets its name from its song, an insect-like buzz. They are quite secretive, except when they sing, usually early on a spring morning, from a plant stalk on a grassy hillside.
The picture above was taken on the first occasion I ever saw a pair of Grasshopper Sparrows together.
The flat head, large bill, buffy face, and dark spot at the rear of the auriculars
all are marks for the species, and the striping on the upper breast indicate that
it is a juvenile.