We live in extreme Southern Michigan and had a very moderate winter.
Until this year we have never seen a bullhead in the pond. Our bluegills
were as large as 9-10 inches and our bass were 14-15 inches.
As far as overfishing, I doubt we have taken 25 fish out over 20 years.
I love to see the herons come and they can have whatever they need, I
just can't imagine they need the larger fish. As I said, we are seeing
more algae this year, so I am checking into that.