Ok guys, looking for your insights here. When you spot a bird school offshore, (usually terns) it is sometimes really obvious they are over tuna as you will see a breaking fish, a flash, or swirl. But what about those times when the birds are behaving similarly but you don't see any obvious signs of fish, are they still holding tuna? And does it make a difference if the terns are crashing into the water vs just picking at the surface? What are your go-to techniques for reading these situations?