The most turbulent part of the Rapids is located between the entrance to the aqueduct canal and the limits of LaSalle and Verdun. There, a number of small and bigger islands can be found, including île aux Hérons, île aux Chèvres and île au Diable. This site was converted into a park in 1937 and nearly 225 bird species come here, including a protected one: the Great Blue Heron.