BARNACLE Barnacle: small maritime goose typically found in bays and estuaries.

BLACK HEADED GULL Black headed gull: a characteristic bird in humid zones. A close relative of the seagull, but smaller and with a black head in summer.

BOUCHOT Bouchot: a line of 110 wooden stakes planted in the sand over a length of 100 metres on which mussels are farmed.

CURLEW Curlew: small coastal wader with a long beak.

DYKES Dykes: two dykes protect the land from the sea. The oldest (11th - 16th century), the Duchess Anne, runs from Cancale to Pontorson. The other, Dutchmen's Dyke, dates from the beginning of the 20th century and enabled the polderisation of the area around the Mont St Michel.

LYME GRASS Lyme grass: a species of grass which holds sand dunes together, here at the southern limit of its growth.

MUD FLAT Mud flat: natural field covered by the sea at high tide. The vegetation largely comprises maritime plants accustomed to salt water.

POLDER Polder: coastal marshland protected by a dyke, drained and brought into use.

ROCK SAMPHIRE Rock samphire: often called the sea gherkin. It is gathered in June and made into a preserve.

SALT MEADOWS Salt meadows: fields covered by the sea at very high tides. The grass growing there is salty and the lambs eating it develop a special flavour.

SEA GRASS Sea grass: the main plant of the mud flats. It is the favourite food of sheep and many birds.

SEA PURSLANE Sea purslane: a type of grass which hold sand dunes together with its roots.

SEED MUSSELS Seed mussels: young mussels around 2 to 3 months old 

WIDGEON Widgeon: a type of duck particularly attracted by the mud flats.