Aiguabarreig is a natural space with great importance as an area of reproduction, wintering and resting of migratory fauna located in Mequinenza (Bajo Cinca, Aragón, Spain). It constitutes the largest river confluence of the Iberian Peninsula (with the union of Ebro, Segre and Cinca rivers) and one of the largest in all Europe. Is considered as one of the greatest biological natural spaces of Aragon.