In my pond, at least, the HSB have not kept excess LMB numbers down. I keep telling them to only eat LMB, but they never listen.
Still, I love HSB and am glad to have them. Saved many a fishing trip when bass turned up their moody noses at our offerings, particularly in cool or cold weather.
Just leave them alone when it gets really hot, as they'll fight to the death, even if released alive after a long battle. And while you can safely put your fingers in their mouth, avoid their gill plate, it is razor sharp!
