I have to wonder what a visit like that does to a pond. I imagine those birds are hungry when they arrive and need to fuel up before going further. Even a few hours must be devastating.

4 acre pond 32 ft deep within East Texas (Livingston) timber ranch. Filled (to the top of an almost finished dam) by Hurricane Harvey 9/17. Stocked with FHM, CNBG, RES 10/17. Added 35lbs RSC 3/18. 400 N LMB fingerlings 6/18