What those big Bluegills are thinking is "time to eat!" I've caught lots of the larger sized BGs at Perris on smaller bass lures that resemble shad or minnows. When these panfish get larger, their diet starts to include small fish. Many times while at Perris, when we find a large school of small shad, the crappie and big Bluegill will be there also, feeding on the baitfish. When I would keep a bunch of BGs for a fish fry, as I filleted them, I would check their stomachs, and many of the largest ones were full of small shad.