The Baie du Mont-Saint-Michel constitutes the territory of thousands of birds, migratory or not, who come to feed at low tide. They also occupy the salt meadows, while the mudflats are the refuge of waders like the little egrets. Thousands of sea geese and brant geese land on the sandbanks in winter. Opposite Mont-Saint-Michel, ducks, sandpipers, plovers, seagulls, and cormorants are visible in the ornithological reserve of Mont Tombelaine.