The Nature Reserve extends in the center of Sesia, in the south of Albano woodland, and consists of a woodland made of poplars, willows, and black locust trees. Among the trees, a wonderful natural heronry characterized by one of the largest bird populations of Italy (1,300 - 1,800 couples) houses little egrets, gray herons, night herons, cormorants, and cattle egrets. A few years ago the spoonbills nested here - the one and only case in Italy - while since 1995 some sacred ibis have settled. (No admittance, except for research reasons. The ornithological species can be observed from the special bird watching hut placed along the perimeter of the Nature Reserve).