I think I had some BSF larvae a couple of years back. I had a big mushroom ring in my back yard, and the mushrooms became infested with maggots. They had a very peculiar behavior: When you scared them, they did an end-over-end tumble off the mushroom onto the ground. Do your exhibit that behavior?
We don't have that many BSF around here. I only see 4-5 a year, usually trapped in a window.
