1.31 The waters of the lagoon habitats (Pisciu
Cane, Testarella and Ventilègne), rich in nutritive salts carried
from the drainage basins across which they pass, stimulate the growth
of lagoon phytoplankton. These lagoons nourish and shelter many marine
species. The dense plant growth, adapted to the complementary influences
of sea and land, is home to many aquatic and avian species. These
biotopes provide ideal shelter for nesting and reproduction and are
an important source of food. Yellow-legged gulls, grey herons, little
egrets and even young ospreys are regularly observed there. The mosaic
of vegetation and the presence of smooth stretches of standing water
make it possible for certain wintering or migrating anatidae to come
here on an irregular basis (mallard ducks, pintails, Northern shovellers,
common teals and garganeys ...), as well as migrating shorebirds (common
snipes, jack snipes, sandpipers, black-tailed godwits, little stints).
Mallards, moorhens and water rails occasionally nest on Testarella
lake. As mentioned above, the Posidonia beds play a major role in
the area's productivity and provide areas for breeding, spawning and
the raising of young.