Cattle Egrets are voracious eaters. Normally they stay with large mammals, like cattle, and eat the insects the bovines stir up, but they will also glean food from water's edge. This is from the Cornell Allaboutbirds website: "Grasshoppers and crickets are the biggest item on their menu, which also includes horse flies, owlet moths and their larvae, cicadas, wolf spiders, ticks, earthworms, crayfish, millipedes, centipedes, fish, frogs, mice, songbirds, eggs, and nestlings."
Great Egrets wade up to chest level to spear their prey or stand like this one and wait for trey to come to it before they jab it with their big yellow bill
This swan stood still for quite some time with one leg tucked under, he was in a small group of ducks and geese, all "hanging" together.