The Cattle Egret is one of the best examples of recent natural expansion of a species range. It used to be confined to Europe and Africa but there are many evidences that it crossed the Atlantic Ocean flying, reaching the Guianas at the end of the 19th. century. The first record in Brazil occured in 1963 at the delta of the Amazon River. Since then the species has spread all over the country, being probably the most numerous egret today.