I was searching the TPWD website. I found 4 community ponds within 30 minutes of the house that were stocked in the late 90s with bluegill or sunfish hybrids.
I first searched for information on the Beaver Pond at Washington on the Brazos park. I found out it went dry in the drought of 2011.
Next, I started searching for information on Hillside Street Park in Navasota. It was stocked with 6000 hybrid sunfish in 1996 and 1997. I couldn't find any information so I went to Google Earth. I scanned back through the images and found there was water in the ponds in 2010 and 2011. So I decided to fish the pond yesterday evening.
The first fish I caught was a small green sunfish. Then a proceeded to catch a bunch of very small native bluegill and one small bass. This was not what I was expecting to find.
I went back to Google images and noticed that the picture in 2010 was taken in February of 2010. The picture in 2011 was taken in October of 2011. The next image wasn't until 2013. Closer review of the 2011 photo shows the water was lower than other years. So I would have to conclude it did get very low and killed all the hybrid sunfish. And somehow native bluegill, green sunfish and bass found there way into the pond.
Actually, all 4 ponds near me went dry. The TPWD never restocked any of these ponds with sunfish. The drought killed a lot of good farm ponds as well. What a shame, I can only image how good the pond fishing would be if the drought never occurred.