The barene are exposed to the tides and are a unique habitat for some animal species. The vast salt-marshes exposed at low tide are an excellent source of food for birds.
The more stable areas are nesting grounds for many interesting species, such as the black-winged stilt (Himantopus himantopus), the avocet (Recurvirostra avocetta), the redshank (Tringa totanus), the common tern (Sterna hirundo) and the sandwich tern (Thalasseus or Sterna sandvicensis).

The sandwich tern is one of the more interesting species that has only recently colonised the area. The black-winged stilt is a migratory species, visiting the lagoon in spring and summer. It nests on the sandbanks, unaffected by the tides, and feeds on small invertebrates in the muddy seabed.
The little egret (Egretta garzetta) is the most common heron in the Venice lagoon and lives here all year round, feeding on small fish in the salt-marshes. During the breeding season, it wears a “wedding dress” with a showy “crest” of feathers.
The sheldrake (Tadorna tadorna) is a particularly populous species of duck on the artificial casse di colmata. The avocet (Recurvirostra avocetta), prefers recently created habitats, such as the artificial sandbanks. It does not tolerate the presence of man or seagulls.

400 - 1000 - until today - rev. 0.1.7