I have a small pond in the back corner of my yard, eighteen inches deep and about four feet across. Had it full of goldfish - probably 35 or 40 three inch long fish that my granddaughters liked to feed when they come over. When they started disappearing I suspected coons. Then one morning I saw the culprit eating breakfast. It was an Egret. By the end of the week there were three Egrets out there, but no fish left for them.