Great Egret. A large white heron, the Great Egret is found across much of the world, from southern Canada southward to Argentina, and in Europe, Africa, Asia, and Australia. Found near marshes and bays, it's primary food source is fish. It can be observed stalking fish ("fishing") and can be observed roosting in trees. Nests are on the ground in mounds and there is fierce competition among the chicks, leading to weaker nest mates being killed by siblings. They are long-lived (up to 23 years).