This is starting to remind me of the SNL routine - "Shimmer is a dessert topping. No, it's a floor wax!" The scientific name for this bird is Casmerodius albus but it has a stack of common names. I've found Great Egret, Great White Egret, Common Egret, American Egret, White Heron and Great White Heron (and I'm sure there are more). Here in South Florida the name Great White Heron usually refers to a different bird entirely, a white morph of the Great Blue Heron.
I've not tried to upload photos before but I'm going to try to attach photos of a Great Egret, a Snowy Egret (Egretta thula) and Cattle Egrets (Bubulcus ibis) that I snapped on the south end of Pine Island, an island off the Gulf Coast of Florida.