River Nadder
The River Nadder is a tributary of the Salisbury Avon, flowing in south Wiltshire, England.
The river flows north from Ludwell to West End where it is joined by the Ferne Brook, close to the Lower Coombe and Ferne Brook Meadows site of special scientific interest. At Wardour it is joined by the River Sem. The river then flows east through Tisbury, where it is joined by the Fonthill Brook, and then onto Barford St Martin and Burcombe before reaching Wilton. Near Quidhampton, the Wylye joins from the north. After passing Harnham, the Nadder joins the Avon near Salisbury Cathedral.
Including its headwaters, the river's length is about.
