I kept hearing this sound which I at first though was a diving bird, then a jumping fish (size very large), but could not catch which.... When suddenly I see them as they come closer. It's either a mating dance or one Pied-billed Grebe beating & chasing the daylight out of another Pied-billed Grebe - - this went on for about 10 minutes if not more.... To me it seems she's really not in the "mood" for this & that he's not taking "no" for an answer......