"I saw this sparrow with a bunch of Tree and Savannah Sparrows late last month by those old ball fields about a quarter mile before you get to the train tracks/main entrance to DeKorte.
"The way it was hanging on the grass stem really stood out to me. The call was unfamiliar to me. I thought it was a marsh wren at first."
We have a couple of theories on ID. What do you think? (Thanks, Brandon!)