Grand Lieu Lake is a large freshwater lake located in western France, near the city of Nantes. It covers an area of approximately 60 square kilometers and is known for its rich biodiversity, including various species of birds and fish. The lake is part of a protected natural area, making it an important site for conservation efforts. The lake experiences significant seasonal changes in size, expanding during the winter months and shrinking in summer. This fluctuation creates diverse habitats that support numerous wildlife species. Grand Lieu Lake is also popular for recreational activities such as birdwatching and fishing, attracting nature enthusiasts year-round.