Fairly large Curruca warbler. Male is distinctive with a black bib and blackish head separated by prominent white moustache. Female has a pale or slightly darker throat. Wing coverts are well-patterned with dark centers and pale fringes. Note rather long bill. Breeds in Mediterranean scrub habitats, usually on rocky mountain sides covered with dense bushes. Non-breeding habitat is likewise scrubby and dry. Song is a scratchy whistle, usually starts with a quick metallic trill. Calls are a metallic "trrrrr" or "chak."