Biržulis
| Lake Biržulis | |
|---|---|
| Coordinates | 55°46′N 22°26′E / 55.767°N 22.433°E |
| Primary outflows | Virvytė |
| Basin countries | Lithuania |
| Max. length | 3.6 km (2.2 mi) |
| Max. width | 1.3 km (0.81 mi) |
| Surface area | 4.7 km2 (1.8 sq mi) |
| Average depth | 0.91 m (3 ft 0 in) |
| Max. depth | 2.4 m (7 ft 10 in) |
| Islands | 2 |
Lake Biržulis is a lake in the Telšiai District of western Lithuania. It has a maximum length in the north-south direction of 3.6 km. The lake has two islands, Spiginas and Duonkalnis, which have yielded Mesolithic and Neolithic burials including the Mesolithic grave of the "Duonkalnis shaman".