Blackcap - Sylvia atricapilla
The male has grey-brown upper parts, pale grey underparts, and a glossy black cap. The female is similar but
has browner upperparts, buff underparts and a red-brown cap
A slightly warble, delivered in verses, with variations in pace and a wide range of pitching and phrasing; verses usually begin hesitantly with a medley of thin-voiced scratchy and buzzy notes and build in rhythm towards the end with clearer-toned, slightly flutey notes in recognisable motif.
The usual alarm call is a sharp, tongue-clicking 'tchk'.