Bowling Green Marsh is a nature reserve located on the confluence of the River Exe (at the top end of its estuary) and the River Clyst, near the town of Topsham in Devon. It is managed by the RSPB.Migratory birds including Siberian brent geese, come to the marsh in the winter to feed. It is a major point of interest for birders across South West Britain, with many rare species present at any one time.