This photo is kind of typical. It's probably a white-throated sparrow, but I can't be sure. The sparrow never came out into the open.
Here are a couple of Savannah Sparrows, easier to see since they prefer the less dense part of the brush.
Here is a White-throated Sparrow:
It's easy to get confused. This bird looks like a large sparrow, but it's a female Red-winged Blackbird: