A 52-hectare protected wetland, it constitutes a relict patch of the Mezzano valleys. Thanks to environmental improvements, the area has acquired considerable naturalistic importance& especially as a nesting and stopover station for various species of migratory birds: herons, black-winged stilts and hawks can be spotted there.

The bights are home to two important wildlife reintroduction projects: the Greylag Goose and the White Stork, in fact the site hosts some aviaries for their reproduction, however some anatids are currently free to fly and nest in the oasis and therefore easily spotted.

The flora consists mostly of aquatic plants, such as water gentians and buttercup, as well as marsh reeds bordering the valley mirrors. The area is equipped with trails surrounding the ponds, some of which are accessible to assisted handicapped persons, with huts for birdwatching and nature photography, Stork House with related museum and outdoor classroom.