Tidal FlatAlso known as mud flats, A broad flat area very close to sea level that is flooded and drained with each rise and fall of the tide :: are coastal wetlands that form when mud is deposited by tides or rivers. They are found in sheltered areas such as bays, bayous, lagoons, and estuaries. Most of the sediment within a mudflat is within the intertidal zone, and thus the flat is submerged and exposed approximately twice daily. Mudflats are typically important regions for wildlife, particularly migratory birds. The maintenance of mudflats is important in preventing coastal erosion, however mudflats worldwide are under threat from prising sea levels and development.