Booterstown Marsh is a nature reserve located in Booterstown. The marsh has brackish water and consists of salt marsh and muds. It is the only bird sanctuary found in south Dublin Bay. Booterstown marsh is part of the South Dublin Bay and River Tolka Estuary Special Protection Area (SPA), and part of a proposed Natural Heritage Area (NHA) and a proposed Special Area of Conservation (SAC).
The area is quite popular for wildfowl and waders during the winter. Birds include black tailed-godwits, redshanks, moorhen, jackdaws, herring gulls, grey herons, black-headed gulls, wood sandpipers, wigeons, wood pigeons, and greenshanks.