Tamar–Tavy Estuary
| Site of Special Scientific Interest | |
View across the Tamar estuary south of Bere Ferrers, looking towards Cargreen | |
| Location | Cornwall, Devon |
|---|---|
| Grid reference | SX435591 |
| Coordinates | 50°24′41″N 4°12′12″W / 50.4113°N 4.2032°W |
| Interest | Biological |
| Area | 1,422.3 hectares (14.2 km2; 5.49 sq mi) |
| Notification | 1991 |
| Natural England website | |
The Tamar–Tavy Estuary is a Site of Special Scientific Interest (SSSI) covering the tidal estuaries of the River Tamar and the River Tavy on the border between Cornwall and Devon in England, UK. Parts of the land designated as the Tamar–Tavy Estuary SSSI are owned by the National Trust and parts are owned by the Ministry of Defence and the Diocese of Truro also owns land in this SSSI. Part of the Tamar estuary also forms the Tamar Estuary Nature Reserve, owned by the Cornwall Wildlife Trust. The site was designated in 1991 for its biodiversity and varying habitats that support many wader and wildfowl species, as well as the special interest of its marine biology.