In my hundreds of hours of watching birds in the southeast, I’ve never seen an alligator eat a wading bird. They obviously do at some point, but I’ve never had the macabre pleasure of witnessing it. If you’re looking at a heron or egret in Everglades National Park, there’s likely an alligator in your field of vision at the same time. They’re often standing in close proximity.
Snowy egrets roosting en masse at Everglades National Park.